earth

火星上的生命和地球生命有什么主要不同之处？anawer:ThereisnoclearevidencethatthereislifeonMars.Sohowcanwemakeacomparison?

C虚拟语气

因为是wecomparelifeonEarthwiththatonMars,所以LifeonEarthiscomparedwiththatonMars注意动词和主语关系就行了

Earth Surface Systems: Complexity，Order，and Scale Jonathan D. Phillips. Blackwell Publishers，Oxford，1999，180 pp. ，43 figures ( combining 12 photos and 31 diagrams) . 4 tables and 63 equations.Earth Surface Systems: Complexity，Order，and Scale，part of the Natural Environment series edited by Andrew Goudie and Heather Viles，was written to promote better understanding of the complexities and interactions of the phenomena that create earth surface systems. Phillips prefers to define whole systems rather than individual components，with emphasis on the way these systems behave and interact with other phenomena through both space and time. In simpler terms， he addresses the fundamental processes that drive earth surface systems and the problems of the simultaneous existence，within a single system，of both order and complexity. Phillips succinctly and clearly defines and explains the complexities of earth surface systems and the interrelations of many varied phenomena. The book is an important contribution to the geomorphic literature and should be a part of the library of any serious earth scientist.The text consists of an introductory chapter followed by eight chapters describing various features and problems of earth surface systems. Numerous photographs and diagrams provide examples of the complexities of the subject. The photos and diagrams are enlarged and extend over the margins，which helps with visualization of the processes discussed. Citations to more detailed accounts of the topic of discussion are liberally inserted throughout the text. An extensive reference list provides ample opportunity for more interested readers to delve deeper into the problems and complexities of earth surface systems and processes.The introductory chapter defines the author"s goals and describes the theoretical background behind his systematic approach to earth processes，rather than a “reductionist”or “nonlinear dynamic systems”approach. However，the author considers these other forms of knowledge to be complimentary to a systems approach rather than competitive，and draws upon reductionist and nonlinear systems dynamics research to support his ideas on many occasions. Phillips claims that reductionist approaches are necessary to fully understand the components of a system，and that nonlinear dynamics research is needed to understand the dynamics of complex systems.The second chapter begins with a qualitative analysis of earth surface systems，but quickly delves into numerical methods for explaining these systems. The chapter is designed for earth scientists who suffer from math anxiety，and is useful for people with limited math experience. Phillips allows students unfamiliar with advanced numerical methods to grasp the basics of systems concepts in relatively simple mathematical terms. This simple approach to numerical modeling， combined with frequent summaries，is a useful learning tool.Chapter Three describes both the order and complexity inherent in landscapes. Phillips provides many examples of the order found in complex systems and，conversely，complexity in orderly systems. The author argues that Earth surface systems are unstable by nature and that they exhibit both complex disorder and stable order at different scales. In simpler terms，complexity and order can exist within the same system at different spatial and temporal scales.The fourth chapter provides brief examples that strengthen the argument that earth surface systems are unstable，often chaotic，and self-organizing. Phillips" assertions are based on a series of case studies and on empirical evidence，the properties of generalized canonical models， deterministic uncertainty，and differation and divergence.Chapter Five specifically discusses the properties of generalized canonical models，including population and hillslope evolution models. This is the most extensive chapter of the text and includes four detailed case studies，each of which represents the complex interactions within a specific system: hydraulic geometry，channel network evolution，topographic relief evolution，and desertification. The spatial and temporal variability，and the disturbances that force a system into chaotic rather than a steady-state mode，are compared for each system. The author states，then elucidates the complexities and interrelations within each system. The case study examples include an excellent range of the earth"s geomorphic systems and focus on the complexities of changing time，scale，and input parameters. This chapter provides valuable insight into fluvial， landscape，and climate variables.The role of pedogenesis，and particularly soils as earth surface systems，is the topic of Chapter Six. Phillips"claim that soils are the classic representation of earth surface systems is well supported with copious examples of the dynamics of soil types and variation within the mechanisms of soil formation. His concept that soils co-evolve with ecosystems，landforms，and other earth surface systems，allows generalizations concerning the behavior of soil systems to be applied to other earth surface systems.In Chapter Seven，Phillips links his field observations with the concept of soils as a canonical example of earth surface systems. This chapter ties together the many and varied concepts that Phillips proposed in previous chapters，and is perhaps the most innovative and comprehensive chapter in the text. His own fieldwork has shown that instability，chaos，and self-organization are common phenomena in the Carolina Coastal Plain and similar results have been shown by investigations in other areas. The phenomena that produce chaotic patterns on the Carolina Coastal Plain are well known. Examples include the preservation of previous perturbations such as tree throw，bioturbation，and root casts. These rather small perturbations tend to persist and grow over time，eventually producing highly variable soil patterns over remarkably short distances. The same processes that control soil development also influence other systems.The question of scale is significant for every geomorphology investigation and the problems related to scale are the focus of Chapter Eight. In this chapter，spatiotemporal scale relationships are linked to the necessity for understanding the rates，duration，and frequencies of the processes that act upon a system. Definition of these processes by any single nonlinear formula or complex systems analysis is not now，and may never be，possible. Phillips states that to fully understand earth surface systems，traveling into the field and measuring the distance，speed，population，and distribution of any such system is imperative.In Chapter Nine，Phillips synthesizes his ideas and concepts by proposing eleven principles of earth surface systems，which clearly summarize the detailed descriptions found in the previous chapters. Reading this chapter before reading the entire text would greatly assist those readers who are not familiar with earth surface systems literature. By reading this chapter first，they would familiarize themselves with the major concepts that the author emphasizes and provide a better overall understanding of the book.Amidst all of the strengths of this book，it is perhaps easier to define the few—but significant—weaknesses. Although the book is written for geographers，geologists，and other earth scientists who have a basic knowledge of physical geography，a more advanced knowledge of earth surface processes is required for complete understanding of the text. The book is more appropriate for advanced undergraduate or graduate students. Most undergraduate earth science majors would find this text overwhelming. The text is obscurely written and jargon-rich，and the absence of a glossary hinders the ease of use. The detail and complexity of the book make it difficult to read; however，it is a significant contribution to advanced earth scientists，and an in-depth examination is rewarding and a true eye-opener for all but the most advanced geomorphologists. Overall，the text is a significant contribution to the understanding of earth systems and is a must for the library of any individual who considers himself an earth scientist or physical geographer.

人间于此，欢喜是你

Nowadays,human beings pay more and more attention to the environmental problems.People cut down trees into use .This behavior cause many serious problems.Many trees were cut down so the forests had gone and the land changed into desert.The sandstorms came into being and washed the earth away.If human don`t deal with these problems,what will the earth be? No one knows.

【答案】：Dit为形式主语，此句为People used to think that the Earth was flat的被动语态形式。

你好！dawnguard.esm黎明守卫吸血鬼剧情线hearthfires.esm炉火住房dargonborn.esm龙裔龙裔剧情线我的回答你还满意吗~~

放到data下 用mod加载器加载就行了 不懂继续追问

光知道高度是不够的,这个要看谷歌用什么设备,是怎么处理图像的……一般来说,Google Earth每一像素的精度是15米,但有些地区精度比较低,比如海上,偏僻的小岛等等,精度可能只有每像素500米甚至更低。现在一些地区,谷歌也在用一些更高清晰的图像替换原有图像。这项业务是Spot Image公司提供的服务,图像精度达到了每像素2.5米。来源希望采纳

Avalanche 雪崩Blizzard 暴风雪Drought 干旱Earthquake 地震Famine 饥荒Flood 洪水Hailstorm 冰雹Heat Wave 热浪Hurricane 飓风Ice Storm 冰暴Lahar 火山崩发Landslide 泥石流Lightning 闪电Limnic Eruption 湖堰崩溃Sandstorm 沙尘暴Tornado 龙卷风Tsunami 海啸Volcanic Eruption 火山喷发，火山暴发Wildfire 野火就这些吧

earth，[u025cu02d0(r)θ]，地球。Earth是地球的英文名称，是太阳系中第三颗行星，也是人类生存的家园。地球的直径约为1.28万公里，自转周期为23小时56分4秒，公转周期为365.24天。地球的表面被70%的海洋覆盖，陆地面积约为148,940,000平方公里，其中包括7个大洲和数以万计的岛屿。地球是一个生命的星球，拥有丰富的生物资源。地球上的生物种类繁多，包括植物、动物、微生物等。其中，人类是地球上最智慧的生物之一，也是地球上最具有影响力的生物之一。人类的活动对地球的环境和生态系统产生了深远的影响，包括气候变化、生物多样性丧失、土地退化等问题。为了保护地球的生态环境，人类需要采取一系列措施，包括减少温室气体排放、保护生物多样性、节约能源、推广可持续发展等。这些措施不仅有助于保护地球的生态环境，也有助于人类的健康和幸福。除了生态环境问题，地球还面临着其他的挑战。例如，人口增长、资源短缺、能源危机、环境污染等问题，都需要人类共同努力来解决。同时，地球也是人类探索宇宙的起点，人类通过太空探索和科学研究，不断深入了解地球和宇宙的奥秘。

earth多指地表带有水分的泥土，较具体。mud，湿土，多指雨后稀泥，污泥。dirt 地表的干松泥土soil 特指适宜栽培农作物或声张各种植物的泥土land 含义笼统，指与河流，海洋相对的陆地，也可指可耕种的土地。

earth地球 soil土壤 land陆地 ground场地

suffer from the earthquake