为什么0是正整数而不是负整数？

0不是正整数。0只是整数。整数（integer）就是像-3,-2,-1,0,1,2,3,10等这样的数。整数的全体构成整数集，整数集是一个数环。在整数系中，零和正整数统称为自然数。-1、-2、-3、?、-n、?（n为非零自然数）为负整数。则正整数、零与负整数构成整数系。整数不包括小数、分数。扩展资料：以0为界限，将整数分为三大类：1、正整数，即大于0的整数如，1，2，3······直到。2、零，既不是正整数，也不是负整数，它是介于正整数和负整数的数。3、负整数，即小于0的整数如，-1，-2，-3······直到。（n为正整数）。现中学数学教材(2005年)中规定：零和正整数统称自然数。整数也可分为奇数和偶数两类。

0不是正整数。0既不是正整数，也不是负整数，它是介于正整数和负整数的数，0是介于-1和1之间的整数，是最小的自然数，也是有理数，是正数和负数的分界点。0被认为是自然数是因为自然数不仅是整数，还要包括0这个数。自然数的概念最初起源于人类计数的需求，包含着基本的数学原理和逻辑思维方式。在日常生活中，0可以表示没有或零个，因此无论在理论还是实际应用上，都与其他自然数有很大的联系和作用。但是由于0具有一些特殊的性质，因此它也会带来一些不同于其他自然数的特殊问题。比如，在除法运算中，如果分母为0，则这个式子是没有意义的；而在减法运算中，0可以被视为一个“反向”的数，即减去0相当于加上0，这对一些数论问题的处理带来了开阔的思路。不仅如此，在代数学、微积分中，0也有着重要的作用。对于一些关键性问题，特别是极限和趋势分析的研究，0被认为是非常重要的数值。比如，在导数的计算中，通过求解极限的方法可以得到非常精确的答案；在微分方程中，0也是重要的方程根。虽然0在一些方面与其他自然数有所不同，但它同样也被认为是自然数的一部分。因此，在许多领域中，0都扮演着至关重要的角色，并且有着独具特色的数学应用。同时，0还具有一些特殊的性质和规律。在数论中，0是几乎所有数字的因数。任何一个数乘以0得到的结果都是0。因此，0是任何环上的零元素，也是乘法幺元素唯一缺失的那个正整数。在计算机科学和信息技术中，0也是非常重要的数字之一。比如，在编程语言和软件开发中，0经常出现在计数、索引、条件判断和错误处理等方面。此外，从另一个角度来看，0也可以被解释为不存在的数量。在某些情况下，0可以被视为一个抽象化的概念，用来表示某些数值、函数或数据不存在或无效。这在逻辑推理和形式化方法的研究中具有重要的作用。例如，在描述程序正确性和安全性时，通过引入“null”和“void”这样的抽象概念，可以更加精确地刻画系统状态和行为。总而言之，虽然0具有一些特殊的性质和用途，但它仍然被认为是自然数的一部分。0作为自然数之一，是现代数学、物理学和计算机科学中不可或缺的基础概念。无论是从理论的角度还是实践应用的角度，0都在不同的领域中发挥着重要作用，并且具有着独特而丰富的数学内涵和思维方式。

0不是正整数。一、0的关系0是正数和负数的分界点，0没有倒数，0的相反数是0，0的绝对值是0，0的平方根是0，0的立方根是0，0乘任何数都等于0，除0之外任何数的0次方等于1。0不能作为分母出现，0的所有倍数都是0，0不能作为除数，0除以任何非零实数等于0。二、整数整数是正整数、零、负整数的集合。整数的全体构成整数集，整数集是一个数环。整数不包括小数知、分数。如果不加特殊说明，所涉及的数都是整数，所采用的字母也表示整数。整数也可分为奇数和偶数道两类。整数中，能够被2整除的数，叫做偶数。不能被2整除的数则叫做奇数。若有限个整数之积为奇数，则其中每个整数都是奇数；若有限个整数之积为偶数，则这些整数回中至少有一个是偶数；两个整数的和与差具有相同的奇偶性；一个整数的平方根若是整数，则两者具有相同的奇偶性。0的历史故事：0是极为重要的数字，0的发现被称为人类伟大的发现之一。0在我国古代叫做金元数字，（意思即极为珍贵的数字）。0这个数据说是由印度人在约公元5世纪时发明，在1202年时，一个商人写了一本算盘之书，在东方中由于数学是以运算为主西方当时以几何并在开头写了“印度人的9个数字，加上阿拉伯人发明的0符号便可以写出所有数字。”0的性质：0既不是正数也不是负数，而是正数和负数之间的一个数，且为正数和负数的分界线。当某个数X大于0（即X>0）时，称为正数；反之，当X小于0（即X<0）时，称为负数；而这个数X等于0时，这个数就是0。

0是整数，但并不是正整数。正整数，为大于0的整数，也是正数与整数的交集。正整数可带正号（+），也可以不带。如：+1、+6、3、5，这些都是正整数。整数的概念。整数，不管是像1、2、3、4等特别小的数，还是像10001、10002那种特别大的数，只要它与前一个整数或者后一个整数相差为1，那么它就是整数，所以0它是一个整数。在数学的语法里面，所有的整数形成一个整数集，作为经常被提到并用到的0，自然也在这个集合里面。整数又分为正整数和负整数，像-888，-999，-852，-777等都是负整数，表现在形式上就是在整数前面有一个“-”的符号。而正数就是例如85，98，999，8521等除0以外的不带“-”的整数都是正整数。其实它们前面都有一个“+”，类似于负数里面的“-”用来表示类型，只不过通常会被省略。“-”表示负数，而“+”表示正数，这样说起来0似乎可以表现为+0和-0，但是这是不可行的，因为0既不是正数也不是负数，它属于第三类。整数分为负整数、正整数和0，三大类，所以0既不是正数也不是负数。换句话说，正整数必须同时具备正数和整数两个条件，0虽然是整数但是它不是正数，这就很清楚了，0不是正整数。数学思维训练转化型这是解决问题遇到障碍，受阻时把问题由一种形式转换成另一种形式，使问题变得更简单、更清楚，以利解决的思维形式。在教学中，通过该项训练，可以大幅度地提高学生解题能力。系统型这是把事物或问题作为一个系统从不同的层次或不同的角度去考虑的高级整体思维形式。在高年级除结合综合应用题以外还可编制许多智力训练题来培养学生系统思维能力。激化型这是一种跳跃性、活泼性、转移性很强的思维形式。教师可通过速问速答来训练练学生。如问：3个5相加是多少?学生答：5+5+5=15或5×3=15。教师又问：3个5相乘是多少?学生答：5×5×5=125。紧接着问：3与5相乘是多少?学生答：3×5=15，或5×3=15。通过这样的速问速答的训练，发现学生思维越来越活跃，越来越灵活，越来越准确。类比型这是一种对并列事物相似性的同实质进行识别的思维形式。这项训练可以培养学生思维的准确性。如：①金湖粮店运来大米6吨。比运来的面粉少1/4吨、运来面粉多少吨?②金湖粮店运来大米6吨，比运来的面粉少1/4，运来面粉多少吨?以上两题，虽然相似，实质不同，一字之差，解法全异，可以点拨学生自己辨析。通过训练，学生今后碰到类似的问题便会仔细推敲，这样就大大地提高了解题的准确性。

0不是正整数0的数学性质：1、0是最小的自然数。2、0能被任何非零整数整除。3、0不是奇数，而是偶数（一个非正非负的特殊偶数）。4、0在多位数中起占位作用，如108中的0表示十位上没有，切不可写作18。5、0既不是正数也不是负数，而是正数和负数的分界点。当某个数X大于0（即X>0）时，称为正数；反之，当X小于0（即X<0）时，称为负数；而这个数X等于0时，这个数就是0。6、0是介于-1和1之间的整数。7、0没有倒数8、0的绝对值是其本身，即，∣0∣=0。

　　0不是正整数，大于0的自然数是正整数。 　　整数包括0、负整数、正整数。 　　自然数用以计量事物的件数或表示事物次序的数。表示物体个数的数叫自然数，自然数由0开始，一个接一个，组成一个无穷的集体。自然数有有序性，无限性。分为偶数和奇数，合数和质数等。

正整数为大于 0的整数，也是正数和整数的交集。正整数通常用N+表示，可带正号（+），也可以不带。正整数可分为质数、1和合数。0既不是正整数，也不是负整数。正整数集是所有正数和整数的数的集合，包括从1开始的所有自然数。通常用符号N + 、 N*、N1、N>0表示。 整数可分为三大类： 1 、 正整数，即大于 0的整数，如，1，2， 3 … N。 2. 、 0既不是正整数，也不是负整数（0是整数）。 3 、 负整数，即小于 0的整数，如，-1，-2，-3… -N。

是。非正整数指非正的整数，即负整数和0。非正整数乘于-1会得到一个非负整数。非正整数的和仍是非正整数。若非正整数的和为零，则其中每个非正整数必等于零。若非正整数的积为零，则其中至少有一个非正整数为零。 整数 就是像0、1、2、3、-10、1、3、10等这样的数。 整数的全体构成整数集，整数集是一个数环。在整数系中，零和正整数统称为自然数。-1、-2、-3、…、-n、…(n为非零自然数)为负整数。则正整数、零与负整数构成整数系。整数不包括小数，分数。 整数的分类 以0为界限，将整数分为三大类 1、正整数：即大于0的整数如：1，2，3······等等。 2、零：既不是正整数，也不是负整数，它是介于正整数和负整数的数。 3、负整数：即小于0的整数如：-1，-2，-3······等等。

正数不包括 0，包括分数和小数

我认为0和自然数都是整数这句话不够严谨，因为0既然自然数，那么整数的定义应为自然数都是整数。

YES

整数包括正整数、负整数和零零也是自然数

有理数是一个整数a和一个正整数b的比，例如3/8，通则为a/b。0也是有理数。有理数为整数（正整数、0、负整数）和分数的统称 。正整数和正分数合称为正有理数，负整数和负分数合称为负有理数。因而有理数集的数可分为正有理数、负有理数和零。由于任何一个整数或分数都可以化为十进制循环小数，反之，每一个十进制循环小数也能化为整数或分数，因此，有理数也可以定义为十进制循环小数。注意：通常把正数和0统称为非负数，负数和0统称为非正数，正整数和0称为非负整数（也叫做自然数），负整数和0统称为非正整数。如果用字母表示数，则a＞0表明a是正数；a＜0表明a是负数；a 0表明a是非负数；a 0表明a是非正数。扩展资料1、有理数加法法则：（1）同号两数相加，取相同的符号，并把绝对值相加；（2）异号两数相加，取绝对值较大的符号，并用较大的绝对值减去较小的绝对值；（3）一个数与0相加，仍得这个数。2、有理数加法的运算律：（1）加法的交换律：a+b=b+a；（2）加法的结合律：（a+b）+c=a+（b+c）。3、有理数减法法则：减去一个数，等于加上这个数的相反数；即a-b=a+（-b）。4、有理数乘法法则：（1）两数相乘，同号为正，异号为负，并把绝对值相乘；（2）任何数同零相乘都得零；（3）几个数相乘，有一个因式为零，积为零；各个因式都不为零，积的符号由负因式的个数决定。5、有理数除法法则：除以一个数等于乘以这个数的倒数；注意：零不能做除数，a/0没有意义。

0是正整数，力也是白三自然数

0是整数，但并不是正整数。和整数一样，正整数也是一个可数的无限集合。在数论中，正整数，即1、2、3……；但在集合论和计算机科学中，自然数则通常是指非负整数，即正整数与0的集合，也可以说成是除了0以外的自然数就是正整数。正整数又可分为质数，1和合数。正整数可带正号（+），也可以不带。 以0为界限，将整数分为三大类： 1、正整数，即大于0的整数如，1，2，3······直到。 2、零，既不是正整数，也不是负整数，它是介于正整数和负整数的数。 3、负整数，即小于0的整数如，-1，-2，-3······直到。（n为正整数） 注：现中学数学教材(2005年)中规定：零和正整数统称自然数。 正整数的定义 正整数，为大于0的整数，也是正数与整数的交集。正整数又可分为质数，1和合数。正整数可带正号（+），也可以不带。如：+1、+6、3、5，这些都是正整数。0既不是正整数，也不是负整数（0是整数）。

不属于。0是整数，但并不是正整数。正整数，为大于0的整数，也是正数与整数的交集。正整数可带正号（+），也可以不带。如：+1、+6、3、5，这些都是正整数。 将整数分为三大类 1.正整数，即大于0的整数，如，1，2，3，…，n，… 2.0既不是正整数，也不是负整数（0是整数）。 3.负整数，即小于0的整数，如，-1，-2，-3，…，-n，…由此可见正整数不包括0。 正整数 和整数一样，正整数也是一个可数的无限集合。在数论中，正整数，即1、2、3……；但在集合论和计算机科学中，自然数则通常是指非负整数，即正整数与0的集合，也可以说成是除了0以外的自然数就是正整数。正整数又可分为质数，1和合数。正整数可带正号（+），也可以不带。

不属于正整数。

零不是正整数。1、原因：整数是正整数、零与负整数构成整数系。整数的全体构成整数集，整数集是一个数环。在整数系中，零和正整数统称为自然数。整数不包括小数、分数。2、整数的分类：（1）正整数，即1、2、3…、n、…（n为非零自然数）。正整数又可分为质数，1和合数。正整数可带正号（+），也可以不带。（2）零，既不是正整数，也不是负整数，它是介于正整数和负整数的数。（3）负整数，即小于0的整数如，-1，-2，-3…、-n、…（n为非零自然数）。正整数和0的定义及含义：一、正整数的定义：为大于0的整数，也是正数与整数的交集。正整数又可分为质数，1和合数。正整数可带正号（+），也可以不带。如：+1、+6、3、5，这些都是正整数。0既不是正整数，也不是负整数（0是整数）。二、0的定义：是自然数之一，是介于-1和1之间的整数，是最小的自然数，也是有理数。0既不是正数也不是负数，而是正数和负数的分界点。三、0的含义：1、0是最小的自然数。2、0能被任何非零整数整除。3、0不是奇数，而是偶数（一个非正非负的特殊偶数）。4、0不是质数，也不是合数。5、0在多位数中起占位作用，如108中的0表示十位上没有，切不可写作18。6、0不可作为多位数的最高位。不过有些编号中需要前面用0补全位数。7、0既不是正数也不是负数，而是正数和负数的分界点。当某个数X大于0（即）时，称为正数；反之，当X小于0（即）时，称为负数；而这个数X等于0时，这个数就是0。8、0是介于-1和1之间的整数。

在初中数学里，“0”是自然数。在九年义务教育教材里，已经规定了“0”是自然数，九年义务教育教材里，把“0”归为自然数了，最小的自然数是0。自然数是从0开始的，例如：0、1、2、3、4、5、6、7、8、9、10、11、12、13等等。扩展资料：自然数是指表示物体个数的数，即由0开始，0，1，2，3，4，5，6，7，8，9，10，11，12等等一个接一个，组成一个无穷的集体，即指非负整数。注：整数包括自然数，所以自然数一定是整数，且一定是非负整数。但相减和相除的结果未必都是自然数，所以减法和除法运算在自然数集中并不总是成立的。用以计量事物的件数或表示事物次序的数。即用数码0，1，2，3，4，??所表示的数。表示物体个数的数叫自然数，自然数一个接一个，组成一个无穷集体。自然数集有加法和乘法运算，两个自然数相加或相乘的结果仍为自然数，也可以作减法或除法，但相减和相除的结果未必都是自然数，所以减法和除法运算在自然数集中并不是总能成立的。两个可以在元素之间建立一一对应关系的有限集具有共同的数量特征，这一特征叫做基数这样，所有单元素集{x}，{y}，{a}，{b}等具有同一基数，记作1。类似，凡能与两个手指头建立一一对应的集合，它们的基数相同，记作2，等等。自然数的加法、乘法运算可以在序数或基数理论中给出定义，并且两种理论下的运算是一致的。自然数是整数（自然数包括正整数和零），但整数不全是自然数，例如：-1-2-3......是整数而不是自然数。自然数是无限的。全体非负整数组成的集合称为非负整数集，即自然数集。在数物体的时候，数出的1.2.3.4.5.6.7.8.9??叫自然数。自然数有数量、次序两层含义，分为基数、序数。基本单位：计数单位：个、十、百、千、万、十万等等。参考资料来源：百度百科-自然数

没有。整数分为：【正数、0、负数】。一、一个物体也没有，用0表示。0和1、2、3...．都是自然数。自然数是整数。二、最小的一位数是1，最小的自然数是0。三、零上4摄氏度记作＋4°℃；零下4摄氏度记作﹣4℃。"+4"读作正四。"-4"读作负四。+4也可以写成4。四、像+4、19、+8844这样的数都是正数。像﹣4、-11、-7、-155这样的数都是负数。五、0既不是正数，也不是负数。正数都大于0，负数都小于0。六、通常情况下，比海平面高用正数表示，比海平面低用负数表示。七、通常情况下，盈利用正数表示，亏损用负数表示。八、通常情况下，上车人数用正数表示，下车人数用负数表示。九、通常情况下，收入用正数表示，支出用负数表示。十、通常情况下，上升用正数表示，下降用负数表示。

当下陆陆续续到了几十位客，落后来了三个戴方巾的和一个道士，走了进来，众人都不认得。内中一个戴方巾的道：“那位是季恬逸先生？”季恬逸道：“小弟便是。先生有何事见教？”那人袖子里拿出一封书子来，说道：“季苇兄多致意。”季恬逸接着，拆开同萧金铉、诸葛天申看了，才晓得是辛东之、金寓刘、郭铁笔、来霞士，便道：“请坐。”四人见这里有事，就要告辞。僧宫拉着他道：“四位远来

0是自然数呀！

下载个五经手册ok了，

My favourite things

My favorite thing from childhoodMy favorite thing from childhood is lisetening to music. I like listening to music best.Because listening to music makes me relaxed.When I am tired,I will listening some quiet music,that makes me fall asleep very quickly.My favorite music is the music that has good lyrics.Good lyrics can also make me learn Chinese or English well.I love listening to music.I will keep this favourite forever.

c180x70

Haveyoustatedthechickensteak?It"smyfavoritefood.Ithasbeautifulblondcolorsandtheamusingsmellalwaysmakemeeatitwithoutcontrol==The"ChickenHero"isafilmaboutthechickensteak.Doyoulikeit?Iwanttoinviteyouintothechickensteaks"world!你尝过鸡排的味道么？它是我最最最喜欢的食物。它那美丽的金黄色泽以及令人愉悦的香味总是让我不受控制地吃掉它==“鸡排英雄”就是一部关于鸡排的电影。你喜欢它吗？我希望能邀请你进入鸡排的世界~

I have really busy weekdays. On Monday to Friday, I have to go to school. Although it is tired for me, it is really worth learning these useful knowledges. On weekends, I can have sometime to do my favourite things; for example, I can fave a good sleep, and then play outside with my friends, and stay with my family in the night to talk some interesting things. It is a busy and rich week for me.

写作思路：先总结我国气候特点，然后写出自己最喜欢的季节，说明喜欢这个季节的原因。正文：The climate in our country is very pleasant.译文：我们国家的气候很宜人。it"s always warm in spring, hot in summer and cold in winter.译文：春天总是温暖的，夏天是炎热的，冬天是寒冷的。My favourite season is autumn, because it"s always warm in September and October.译文：我最喜欢的季节是秋天，因为九月和十月总是温暖。It"s often cold in November.译文：十一月经常很冷。It"s certainly interesting.译文：这当然很有趣。The other reason is the days are short and the nights are long.译文：另一个原因是白天短，夜晚长。The sun rises late and sets early.译文：太阳升得迟而落得早。I can do my favourite things in the evening.译文：晚上我可以做我最喜欢的事。Autumn is a harvest season.译文：秋天是收获的季节。I can make great progress in autumn.译文：我可以在秋天取得很大的进步。I like the golden season, and you?译文：我喜欢黄金季节，你呢？

My favourite bookI"ve read a book called “The Lion King”. I already watch it in the cartoon when I was little, but now I reverse the story by reading the book. It was a book about the King of the private land called Mufasa, he have a brother called Scar, a jealousy person. He wants to be the future king, to be the leader of all animals. But his dream is broken by the newborn baby of Mufasa – Simba~! A really cute little lion, because he will become the future king after Mufasa"s death, therefore there"s no chance for Scar. So he"s trying to kill both of them. So he puts Simba into danger and killed Mufasa. He told Simba it was all Simba"s false because Mufasa is dead because he was trying to safe Simba. So Simba run away by fear. He meets two friends in a beautiful land. They taught Simba everything will be fine as the time passing. But once Simba meet his best friend Sara, and he follows her back to his kingdom and found out the truth about his father"s death, therefore he killed Scar, and he live happily with other animals ever after~! This is a good story for everyone, it"s easy for children to understand the main story, but it"s good for someone even older because it tell us that it"s important to facing the past, even know the past may hurts but you have to face it and learn things from it, don"t let it happens next time to make a better future~!! I enjoy reading different kinds of books, but "Harry Porter" is my favorite one. The story is very long but I am interested in it. Harry was such a brave and clever boy that he dared to fight against powerful enemies. His Z-shaped scar and magic stick brought me into a magical world. In fact, the fiction story is so meaningful that I can learn a lot from it. I think it"s the best book I"ve ever read.

【 #小学英语# 导语】英语作文，是指用英语针对某一内容写出一篇文章，是英语考试最常见的一种题目类型，英语作文要求阅读、写作能力比较高，也是考生最容易失分的题型。以下是 整理的《小学生英语作文My Favourite Food》相关资料，希望帮助到您。 1.小学生英语作文My Favourite Food 　　My favourite food is cake.because it is very delicious. 　　Although cake is very sweet,it looks very beautiful.On my birthday,my mother bought a cake for me.I was very happy.There were many things on the birthday cake.For example ,some fruit and chocolate.There were also some candles on it.l like chocolate very much but its not healthy for me to have too much chocolate.Because I will be too fat. 　　Cake is my favourite,I think you will also like it!　 2.小学生英语作文My Favourite Food 　　Fish is my favorite food. I don"t know why I like to eat it. 　　I just feel the smell of fish is very delicious. Maybe is heredity, as my father and grandma also like it. 　　What"s more, I don"t care what kind of fish or what kind of coking style, I like all of them without reasons. 　　Every time my mother cook fish, I will eat much more than usual. 　　So my mother always says that she gives birth to a cat. Every time she says that all of us laugh. 3.小学生英语作文My Favourite Food 　　There are many foods in the food realm.Potato is my favourite food. 　　Most of us like potatoes,because they are delicious.Im no exception.Scientists tell us that they are good for our health,thats why I like patatoes. 　　Potatoes are the well-known vegetables in the world.They are usually cooked with meat.Oh!That sounds good. 　　Hurry!Hurry!Lets taste the potatoes.Eat more potatoes,and you will become stronger. 4.小学生英语作文My Favourite Food 　　There are many many foods we can eat such as apple banana pear carrot onion orange potato and many others. 　　My father likes to eat very thing expect it is not be able to eat. My mother likes to eat vegetables and fruits she usually eat some meat. I like to eat meat and fruits too but I do not like to eat vegetables and apple is favorite food. 　　It is very tasty and has many things which our body need; they also can clean our teeth. Some of them are red some of them are green. 　　I like to eat the red ones because they look nicer than the green ones. Apples are very useful someone say apple can make people more beautiful and strong. 　　I do not think apples can make us more beautiful and strong but I believe someone who always eats apples will be more health than someone who does not like to eat apples will not be very strong! 5.小学生英语作文My Favourite Food 　　Do you know what this is? Guess! Its colour is yellow. It"s long and thin. It looks like a small boat and crescent. Oh, it is a banana. Do you know what that is? Guess again! Its colour is orange. It"s round. It looks like a small ball and a small lantern. Oh, it is an orange. I like then a lot. I like ice-creams. I like to chew gum. Chocolates and candies are yummy. I like them very much. How about you? What"s your favourite food? 6.小学生英语作文My Favourite Food 　　Do you have your favourite food My favourite food is chicken wings.I like spicy chicken wings best.Because I think they"re nice.Every week I often eat six chicken wings.They"re good for your health.They can make you strong.But you can"t eat a lot.They are bad for your stomach.I love chicken wings.I can"t leave them.

My favourite food is cake.because it is very delicious.Although cake is very sweet,it looks very beautiful.On my birthday,my mother bought a cake for me.L"m very happy.There are some things on the cake.For example ,some fruit and some chocolate .l also like chocolate very much .Cake is my favourite .翻译我最喜欢的食物是蛋糕，因为它很美味，虽然蛋糕很甜，但它看上去很漂亮，在我的生日，我妈妈买给我一个蛋糕，我非常开心，有许多东西在蛋糕上，例如：一些水果和巧克力，我也非常喜欢吃巧克力，蛋糕是我最喜欢的食物。

H型钢规格重量表是为了方便查询常用H型钢理论重量而制作的表格，如下常用H型钢理论重量表祝工作顺利！

Myfavouritefoodiscake.becauseitisverydelicious.Althoughcakeisverysweet,itlooksverybeautiful.Onmybirthday,mymotherboughtacakeforme.L"mveryhappy.Therearesomethingsonthecake.Forexample,somefruitandsomechocolate.lalsolikechocolateverymuch.Cakeismyfavourite我最喜欢的食物是蛋糕，因为它很美味。虽然蛋糕很甜，但它看上去很漂亮。在我的生日，我妈妈买给我一个蛋糕。我非常开心。有许多东西在蛋糕上。例如：一些水果和巧克力。我也非常喜欢吃巧克力。蛋糕是我最喜欢的食物

规格：400*250*6*8，理论重量49.49kg/m规格：400*250*8*10，理论重量63.11kg/m规格：400*250*6*10，理论重量57.15kg/m规格：400*250*8*12，理论重量70.71kg/m

1. 写一篇我最喜欢的东西的英语作文 My favorite animal is a panda. The panda looks like a bear or a polar bear . I think the panda is very cute and lovely, and is very strong and heavy. They can walk and they can climb up trees. They live in China. I like them. Panda is one of the scarcest animals. People in the world like it very much. There used to be many pandas in China long ago. As the balance of nature was destroyed and the weather was getting warmer and warmer, pandas became fewer. But at present, the number of pandas is increasing year by year. There are now so many pandas that some are being sent to other countries so that people there can enjoy them. Nowadays, the biggest nature park for panda in China is in Sichuan. There is a research centre for nature and wild life there. Scientists hope that one day they will have enough pandas to be set free and let them live in the wild again. 2. 英语作文我最喜欢的东西 My favourite things My favourite things are books and apples. Why do I like books so much? Because I can learn a lot of things from books. If I read more and more books,I will know more and more things about the world.Books are useful for us. Why do I like apples so much? Because apples are very tasty.It"s very good for us to eat apples often. so,My favourite things are books and apples. 3. 一篇英语作文 《我最喜欢的东西》 给你提供三篇，自己选择一下e799bee5baa6e59b9ee7ad9431333335313066吧。 1 My name"s Oliver. I"m a 15-year-old student of medium build. I"m outgoing. The thing that I like best is a bike. The bike is very special. It"s a little different from other bikes. It"s a bit bigger. When I was 12 years old my parents gave it to me as a birthday present. How happy I was that day! Now I often ride it to school and on weekends I ride it to the sports club to play sports. When I e home I clean it carefully. I love my bike and I love my parents. 2 Hi. I"m a student of 14. My name"s Sue. I"m of medium height and very popular in my class. I"ve got many things but I like my pen best. The pen is beautiful. It is black. It"s one of the presents that I"ve got. Last year I got a C in English and I was very sad. My English teacher gave the pen to me and encouraged me to study hard. From then on I spent more time studying English. Now I have made great progress in English and I enjoy learning English. I love my pen and I live my English teacher. 3. My favourite things My favourite things are books and apples. Why do I like books so much? Because I can learn a lot of things from books. If I read more and more books,I will know more and more things about the world.Books are useful for us. Why do I like apples so much? Because apples are very tasty.It"s very good for us to eat apples often. so,My favourite things are books and apples. 希望能帮到你，祝更上一层楼O（∩_∩）O 4. 英语作文 我最喜欢的东西 给你提供三篇，自己选择一下吧。 1 My name"s Oliver. I"m a 15-year-old student of medium build. I"m outgoing. The thing that I like best is a bike. The bike is very special. It"s a little different from other bikes. It"s a bit bigger. When I was 12 years old my parents gave it to me as a birthday present. How happy I was that day! Now I often ride it to school and on weekends I ride it to the sports club to play sports. When I e home I clean it carefully. I love my bike and I love my parents. 2 Hi. I"m a student of 14. My name"s Sue. I"m of medium height and very popular in my class. I"ve got many things but I like my pen best. The pen is beautiful. It is black. It"s one of the presents that I"ve got. Last year I got a C in English and I was very sad. My English teacher gave the pen to me and encouraged me to study hard. From then on I spent more time studying English. Now I have made great progress in English and I enjoy learning English. I love my pen and I live my English teacher. 3. My favourite things My favourite things are books and apples. Why do I like books so much? Because I can learn a lot of things from books. If I read more and more books,I will know more and more things about the world.Books are useful for us. Why do I like apples so much? Because apples are very tasty.It"s very good for us to eat apples often. so,My favourite things are books and apples. 希望能帮到你，祝更上一层楼O（∩_∩）O 5. 请用英语写一篇作文,是写我最喜欢的一件物品,字数50字, My favorite thing is a snow globe.I get it from my brother on my 7th birthday.Well,this is a lovely snow globe with a very large birthday cake in it.There are many beautiful candles on the birthday cake.There are also some snow men around this cake.I like this snow globe very much, because it is very valuable and meaningful.。 6. 英语作文 我最喜欢的东西 给你提供三篇，自己选择一下吧。 1 My name"s Oliver. I"m a 15-year-old student of medium build. I"m outgoing. The thing that I like best is a bike. The bike is very special. It"s a little different from other bikes. It"s a bit bigger. When I was 12 years old my parents gave it to me as a birthday present. How happy I was that day! Now I often ride it to school and on weekends I ride it to the sports club to play sports. When I e home I clean it carefully. I love my bike and I love my parents. 2 Hi. I"m a student of 14. My name"s Sue. I"m of medium height and very popular in my class. I"ve got many things but I like my pen best. The pen is beautiful. It is black. It"s one of the presents that I"ve got. Last year I got a C in English and I was very sad. My English teacher gave the pen to me and encouraged me to study hard. From then on I spent more time studying English. Now I have made great progress in English and I enjoy learning English. I love my pen and I live my English teacher. 3. My favourite things My favourite things are books and apples. Why do I like books so much? Because I can learn a lot of things from books. If I read more and more books,I will know more and more things about the world.Books are useful for us. Why do I like apples so much? Because apples are very tasty.It"s very good for us to eat apples often. so,My favourite things are books and apples. 希望能帮到你，祝更上一层楼O（∩_∩）O 7. 我喜欢的东西 英语作文 My favorite day of the Spring Festival, because I like the atmosphere of excitement, there is a warm feeling of family reunion. My favorite city is Paris, I love the other side of the monuments and elegant atmosphere. Purple is my favorite color, because it is full of mysterious beauty. If we let me choose a sport I love, I would choose table tennis, because it"s popular. I love KFC, even if it is unhealthy fast food. But I love it fast and easy. Speaking of movies, I love that "The Painted" It makes me understand the meaning of love

1My name"s Oliver. I"m a15-year-old student of medium build. I"m outgoing.The thing that I like best is a bike. The bike is very special. It"s a little different from other bikes. It"sa bit bigger. When I was 12 years old my parents gave it to me as a birthday present. How happy I was that day! Now I often ride itto school and on weekends I ride it to the sports club to play sports. When I come home I clean it carefully.I love my bike and I love my parents.2Hi. I"m a student of 14. My name"s Sue. I"m of medium height and very popular in my class.I"ve got many things butI like my pen best. The penis beautiful. It is black. It"s one of the presents that I"ve got. Last year I got a C in English and I was very sad. My English teacher gave the pen to me andencouraged me to study hard. From then on I spentmore time studying English. Now I have made greatprogress in English and I enjoy learning English.I love my pen and I live myEnglish teacher.3.My favourite thingsMy favourite things are books and apples.Why do I like books so much? Because I can learn a lot of things from books. If Iread more and more books,I will know more and more things about the world.Books are useful for us.Why do I like apples so much? Because apples are very tasty.It"s very good forus to eat apples often.so,My favourite things arebooks and apples.希望能帮到你,祝更上一层楼O(∩_∩)O

用带钢的宽度进行计算；计算公式是长*宽*高*0.785（钢材密度）例：宽度12公分，高度4公分，翼边为0.5公分，板厚为2毫米的c型钢带宽为194mm，1件1米长的型钢重量是19.4*100*0.02*0.785=30.458kg。

My favorite thing is an alarm clock.. I have it for five years.. I didn"t do well in my grades, so mom and dad worried me very much..Mom and dad said that as long as my grades have improved. Will buy me a gift I like. So I study hard. When I got the exam, I got better grades.. Parents bought me an alarm clock when I was on holiday.. For me, this alarm clock has a different meaning. I"ll keep it all the.

My Favourite ThingsMy Favourite Things歌手：Jewel词：Jewel曲：JewelRaindrops on rosesAnd whiskers on kittensBright copper kettlesAnd warm wool mittensBrown paper packagesTied up with stringsThese are a few of my favourite thingsCream coloured poniesAnd crisp apple strudelsDoorbells and sleigh bellsAnd schnitzel with noodlesWild geese that flyWith the moon on their wingsThese are a few of my favourite thingsGirls in white dressesWith blue satin sashesSnowflakes that stayOn my nose and eyelashesSilver white wintersThat melt into springsThese are a few of my favourite thingsWhen the dog bitesWhen the bee stingsWhen I"m feeling sadSimply remember my favourite thingsAnd then I don"t feel so badRaindrops on rosesAnd whiskers on kittensBright copper kettlesAnd warm wool mittensBrown paper packagesTied up with stringsThese are a few of my favourite thingsCream coloured poniesAnd crisp apple strudelsDoorbells and sleigh bellsAnd schnitzel with noodlesWild geese that flyWith the moon on their wingsThese are a few of my favourite things

4600块啊，即就是4.600*1000块。

Everyone has a importent thing.Athough it has many differences .Everybody has a same thing.It"s our lives.It"s my favourite thing.I had it since I was born.My father and my mother gave it to me.It was colourful and wonderful.It made me enjoy the fun of the life.Because I had it, I could do a lot of things.I could speak, eat ,drink, study......If I don"t have it,I will not write the composition.If I lose it,That mean I will lose everything.Because I had it,i could think.Even though,I have alot of favorite things,If Ilose my it I won"t have them any more.I will lose them.I love my life.I also thank my parents.Everyone should love life.Do you think so?

Raindrops on roses and whiskers on kittens Bright copper kettles and warm woolen mittens Brown paper packages tied up with strings These are a few of my favorite things Cream colored ponies and crisp apple streudels Doorbells and sleigh bells and schnitzel with noodles Wild geese that fly with the moon on their wings These are a few of my favorite things Girls in white dresses with blue satin sashes Snowflakes that stay on my nose and eyelashes Silver white winters that melt into springs These are a few of my favorite things When the dog bites When the bee stings When I"m feeling sad I simply remember my favorite things And then I don"t feel so bad

150乘400的H型钢的重量是每米55.2公斤，因为假设150乘400的H型钢是标准截面尺寸，也就是HN400x150，详细参见GB/T 11263-2017表1。

1My nameu2019s Oliver. Iu2019m a15-year-old student of medium build. Iu2019m outgoing.The thing that I like best is a bike. The bike is very special. Itu2019s a little different from other bikes. Itu2019sa bit bigger. When I was 12 years old my parents gave it to me as a birthday present. How happy I was that day! Now I often ride itto school and on weekends I ride it to the sports club to play sports. When I come home I clean it carefully.I love my bike and I love my parents.2Hi. Iu2019m a student of 14. My nameu2019s Sue. Iu2019m of medium height and very popular in my class.Iu2019ve got many things butI like my pen best. The penis beautiful. It is black. Itu2019s one of the presents that Iu2019ve got. Last year I got a C in English and I was very sad. My English teacher gave the pen to me andencouraged me to study hard. From then on I spentmore time studying English. Now I have made greatprogress in English and I enjoy learning English.I love my pen and I live myEnglish teacher.3.My favourite thingsMy favourite things are books and apples.Why do I like books so much? Because I can learn a lot of things from books. If Iread more and more books,I will know more and more things about the world.Books are useful for us.Why do I like apples so much? Because apples are very tasty.It"s very good forus to eat apples often.so,My favourite things arebooks and apples.

Everyone has a importent thing.Athough it has many differences .Everybody has a same thing.It"s our lives.It"s my favourite thing.I had it since I was born.My father and my mother gave it to me.It was colourful and wonderful.It made me enjoy the fun of the life.Because I had it, I could do a lot of things.I could speak, eat ,drink, study......If I don"t have it,I will not write the composition.If I lose it,That mean I will lose everything.Because I had it,i could think.Even though,I have alot of favorite things,If Ilose my it I won"t have them any more.I will lose them. I love my life.I also thank my parents.Everyone should love life.Do you think so?

1. 我身边最喜欢的人 用英文写一篇作文 My favorite is my mother. She was beautiful and big eyes, occasionally flashing a shrewd eye. Perhaps not know when, looking for a girlfriend always love and take her mother to pare. Mother, I am suffering for my fuel, encouraged me. Mother, I am happy with my share of happiness, even if she was not happy. Mother with me to take care of me. Care from an early age as me. When present, or remain the same. I love my mother. Like the earth and among the flowers. Pure time, good fun. 2. 英语作文 我最喜欢的东西 给你提供三篇，自己选择一下吧。 1 My name"s Oliver. I"m a 15-year-old student of medium build. I"m outgoing. The thing that I like best is a bike. The bike is very special. It"s a little different from other bikes. It"s a bit bigger. When I was 12 years old my parents gave it to me as a birthday present. How happy I was that day! Now I often ride it to school and on weekends I ride it to the sports club to play sports. When I e home I clean it carefully. I love my bike and I love my parents. 2 Hi. I"m a student of 14. My name"s Sue. I"m of medium height and very popular in my class. I"ve got many things but I like my pen best. The pen is beautiful. It is black. It"s one of the presents that I"ve got. Last year I got a C in English and I was very sad. My English teacher gave the pen to me and encouraged me to study hard. From then on I spent more time studying English. Now I have made great progress in English and I enjoy learning English. I love my pen and I live my English teacher. 3. My favourite things My favourite things are books and apples. Why do I like books so much? Because I can learn a lot of things from books. If I read more and more books,I will know more and more things about the world.Books are useful for us. Why do I like apples so much? Because apples are very tasty.It"s very good for us to eat apples often. so,My favourite things are books and apples. 希望能帮到你，祝更上一层楼O（∩_∩）O 3. 关于写“我最喜欢的书包”英语作文用英语怎么写 My schoolbag Everyone has his school bag, I am no exception. Don"t look at my bag is ordinary, it can putmany books, its color is blue and gray, its shape is rectangular, there are o *** all zipper.Night, as if sleeping in the book bag. Every day, it will acpany me in class, to acpany me to go home, acpany me to do my homework。。 Once, outside under a heavy downpour, it seemed to be a warrior,protecting my homework and book. Every day, I with a heavy bag on his back to school, to various places. Every day, I like to see the book is on the inside. Ah! I have a rare bag, I love my school bag. 4. 英语作文我最喜欢的东西 My favourite things My favourite things are books and apples. Why do I like books so much? Because I can learn a lot of things from books. If I read more and more books,I will know more and more things about the world.Books are useful for us. Why do I like apples so much? Because apples are very tasty.It"s very good for us to eat apples often. so,My favourite things are books and apples. 5. 写一篇我最喜欢的东西的英语作文 My favorite animal is a panda. The panda looks like a bear or a polar bear . I think the panda is very cute and lovely, and is very strong and heavy. They can walk and they can climb up trees. They live in China. I like them. Panda is one of the scarcest animals. People in the world like it very much. There used to be many pandas in China long ago. As the balance of nature was destroyed and the weather was getting warmer and warmer, pandas became fewer. But at present, the number of pandas is increasing year by year. There are now so many pandas that some are being sent to other countries so that people there can enjoy them. Nowadays, the biggest nature park for panda in China is in Sichuan. There is a research centre for nature and wild life there. Scientists hope that one day they will have enough pandas to be set free and let them live in the wild again. 6. 英语作文 我最喜欢的事 I like reading books when I have time. I think it"s a good way to relax and spend my free time. When I was a kid, my mother often read books for me before I went to bed. From then on I was interested in reading books. "Books are man"s best friends." Books give us knowledge.Through reading, we can understand more kinds of people, how do they think. When I read, I always lose myself in the book and fet all my worries. I like reading all kinds of books, story-books, novels and so on. My farourite book is "Harry Porter".当我有时间时，我喜欢读书。我认为读书时很好的放松和度过业余时间的好方法。当我还是个孩子时，我母亲在我睡觉前经常给我读。从那时起我就对读书感兴趣。“书是人类最好的朋友”，书给我们知识，通过读书，我们可以明白各种各样的人及他们如何的想法。当我读书时，我总沉浸在书中，忘记了我的烦恼。我喜欢读各种各样的书，故事书，小说等等。我最喜欢的书是《哈利波特》。 如果想写喜欢运动方面的，请hi我哟。 希望对你有帮助，祝：学业有成，更上一层楼 7. 我最喜欢的产品英语作文怎么写 我喜欢很多食物，像大米饭，面条，饺子，粥，汉堡包等等。 但是我最喜爱的是饺子。每个星期天，我母亲经常为我包很多饺子。 如果她没有时间做，我就去超级市场买一些。饺子看起来像白色的船。 它们尝起来美味可口。每年在我生日那天，我经常和母亲包很多很多的饺子，因为我经常请朋友和我们一起吃饺子。 饺子里面有不同种类的蔬菜。我的朋友们都非常喜欢吃。 在所有的食物中，我最喜欢吃饺子。你呢，我亲爱的朋友们？ 你也喜欢吃饺子吗？Ilikealotoffoods,likerice,noodles,dumplings,porridge,hamburgersandsoon.Butmyfavouritefoodisdumplings.EverySunday,mymothermake *** anydumplingsforme.Ifshehasnotimetomakethedumplings,I"llgotothesupermarkettobuysome.Dumplingslooklikewhiteboats.Theytastedelicious.Onmybirthdayeveryyear,IusuallymakealotofdumplingswithmymotherbecauseIoftenasksomefriendstoeatthemwithme.Therearedifferentkindsofvegetablesinthem.Myfriendsallliketoeatthemverymuch.Ofallthefoods,Ilikedumpling *** est.Whataboutyou,mydearfriends?Doyoulikedumplings,too?。 8. 以我最喜欢的写一篇英语作文 My favourite The blue sky which is my favourite ,I like looking up the blue sky because of its clear.I "m looking forward to fly because its puerility and harmonious。I want to be a angle fling myself into its cherish。 puerility and harmonious天真与和谐 I want to be aangle fling myself into its cherish。我想要变成天使投入他的怀抱 9. 英语作文（我最喜欢的一个人） 一、方法如下： 第一段，开篇点题，直接指出我最喜欢（人名），然后写明为什么喜欢这个人，一句话交代这个人取得的成就。 第二段要对人物有个背景介绍（出生日期和出生地等），接下来应在第二段用大篇幅介绍人物事迹，比如：哪一年取得的奖项或者成绩 ，这个人在取得成绩过程中付出的努力等。 第三段再次点题喜欢这个人物和期望等。 二、范文示例： Who is your favourite person? I like Zhang Yining best. She is a famous ping-pong player. Now I will tell you something about her. （释义：谁是你最喜欢的人？我最喜欢张怡宁。她是一个著名的乒乓球运动员。现在我要告诉你一些关于她的事。） Zhang Yining was born on October 5, 1982 in Beijing. When she was 6, she began to play ping-pong. In 1991, she joined the provincial table-tennis team. In 1993, she entered the national team. She always worked hard, and she never gave up. So at the 2004 Olympic Games in Athens, she won the gold medal of Women"s Singles. It was the hundredth gold medal thatChinagot at the Olympic Games. Before this, she and Wang Nan won a gold medal together. She was the third player who obtained o gold medals at the same Olympics in ping-pong. Before her, only Deng Yaping and Wang Nan could do that. （释义：张怡宁1982年10月5日出生于北京。当她6岁时，她开始打乒乓球。1991年，她加入了省级乒乓球队。1993年，她进入国家队。她总是努力工作，从不放弃。所以在2004年雅典奥运会上，她获得了女子单打金牌。这是中国在奥运会上获得的第100枚金牌。在此之前，她和王楠一起夺得金牌。她是第三位在乒乓球比赛中获得两枚金牌的选手。在她之前，只有邓亚萍和王楠能做到这一点。） So I think she is very great. We are all proud of her. We should learn from her. （释义：所以我觉得她很棒。我们都为她感到骄傲。我们应该向她学习。）

MY FAVORITE THINGS （Daffodils，green meadows，sky full of stars）Raindrops on roses and whiskers on kittens, Bright copper kettles and warm woolen mittens, Brown paper packages tied up with strings, These are a few of my favourite things. Cream-colored ponies and crisp apple strudels, Doorbells and sleigh bells and schnitzel with noodles, Wild geese that fly with the moon on their wings, These are a few of my favourite things. Girls in white dresses with blue satin sashes, Snowflakes that stay on my nose and eyelashes, Silver-white winters that melt into springs, These are few of my favourite things. When the dog bites, When the bee stings, When I"m feeling sad, I simply remember my favourite things And then I don"t feel so bad!

My Favorite Food Hello everyone!My name is Cindy.I am14.Let me introduce my favorite food. For breakfast,my favorite food are eggs.They are very nutritious.For lunch,my favorite food are hamburgers.So popular!They are very delicious.But my parents told me they were junk food.For dinner,my favorite food is chicken.It is healthy food.Chicken is good for our body. These are my favorite food!不是抄的，手打上去的，望采纳〜

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