A fascinating thing about Earth, which may make it unique, is that all through its very long existence, all four and a half billion years, variations in the luminosity of the Sun have been compensated for by a variable greenhouse effect. It's like a sort of geophysical thermostat keeping t...
Life continued to evolve, inventing new forms. This white rock is testimony to an upheaval that occurred 2.5 billion years ago in the oceans, a development which changed the entire history of life on Earth, a planet-scale revolution brought about by micro-organisms.生命继续进化，创造新的形式。
解析 A。本题考查主语从句。“What makes the earth unique”是主语从句,what 在从句中作主语。that 在主语从句中不充当成分,没有实际意义;which 通常表示在一定范围内的选择;who 指人。这里是说地球独特的原因,不是人,也不是选择,所以选 A。反馈 收藏 ...
What is so unique about CO 2 ? In this chapter, Greenhouse effect, radiative forcing, global warming potential, global carbon cycle, and other phenomena that control the livability of our planet are linked to unique optical and physicochemical properties of CO 2 . An increasing body of ...
UNIT13 What Is "American”About the USA? 是什么让美国独一无二,成为地球上一个特别的地方? What makes the USA unique, a special place on earth? 首先,这是“西方”最极端的例子。 For one thing, it is the most extreme example of what it means to be "Western." 在主要西方...
doesn’t help either. The result is a diverse line of projects that each advance along their unique paths. For better or worse, ALife mirrors the very subject it studies. Its muddled (混乱的) progression is a striking parallel (平行线) to the evolutionary struggles that have shaped Earth ...
Scientists also believe that understanding what's unique about Earth is crucial for understanding what other planets might be like. After all, even with all the spacecraft humans have sent out to explore our neighboring worlds, Earth remains the only one with which we have first-hand knowledge....
doesn’t help either. The result is a diverse line of projects that each advance along their unique paths. For better or worse, ALife mirrors the very subject it studies. Its muddled (混乱的) progression is a striking parallel (平行线) to the evolutionary struggles that have shaped Earth’...
What is unique about boreal forests?Question:What is unique about boreal forests?World Biomes:The land area of the world is divided into several large biomes that transition from one to the other as we move from one climate area to another. This means that when we encounter the same climate...
The Gobi Desert is located in Southern Mongolia and Southern and Southwestern China. It's the second largest desert in Asia, after the Arabian desert, and the fifth largest in the world. It has a unique climate, ecosystem and an important place in history as the birthplace of the Mongolian...