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【单选题】Passage One The climate of earth has fluctuated quite a bit over the last 4.6 billion years of our planet’s history and it can be expected that the climate will continue to change. One o...
A.
The climate of earth has fluctuated quite a hit over the last 4.6 billion years.
B.
An increase in the earth’s temperature will have major consequences for all life on this planet.
C.
The information we have got makes us unable to explain the global warming completely.
D.
The Pleistocene began about 1.8 million years ago.
【单选题】新生代可分为第三纪和第四纪，第三纪时发生了一次规模巨大的______造山运动，第四纪生物发展史上的重大飞跃是出现了______。
A.
乞力马扎罗 人类
B.
喜马拉雅 人类
C.
阿尔卑斯 恐龙
D.
安第斯 恐龙