Passage 2
26.【答案】A。解析:推断题。全篇意在说明与全球的生物进化相比,人类历史只有很短的时间。
27.【答案】D。解析:根据题干定位至第二段最后一句以及第三段句首when primitive ocean life begins to evolve into complex organisms such as trilobites (三叶虫). If we examine the land instead of the oceans, we find a lifeless waste. 由此可知答案是D项,其它选项时间不对应。
28.【答案】B。解析:推断题。根据第二段through all of January and February it cools and is cratered (变成坑状) and the first oceans form. But those oceans remain lifeless until sometimes in March or early April, when the first living things develop. 可知,地球在二月份温度降低,变成坑状,形成最初的海洋。海洋里仍然不存在生命,直到三月或四月初才有生命出现。由此可以推断,最初的地球温度很高。故答案选B,其他选项与定位句意思相悖,排除。
29.【答案】C。解析:细节题。根据题干关键词dinosaurs定位至倒数第二段最后一句Dinosaurs, for example, appear about December 12 and vanish by Christmas Eve 可知恐龙在12月12号出现,在平安夜(12月24号)消失。故答案选C。
30.【答案】C。解析:细节题。根据题干关键词the Declaration of Independence定位至文章最后一句The Christian era begins only 14 seconds before the New Year, and the Declaration of Independence is signed with 1 second to spare. 可知,《独立宣言》的签订比新年早一分钟。故答案选C。
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