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The first paragraph of the text deals mainly with the earth atmosphere’s ______. According to the text, the fundamental cause o
The first paragraph of the text deals mainly with the earth atmosphere’s ______. According to the text, the fundamental cause o
admin
2009-04-23
25
问题
The first paragraph of the text deals mainly with the earth atmosphere’s ______.
According to the text, the fundamental cause of the ice ages is ______.
选项
A、periodic changes in the earth’s orbit around the sun
B、fossil remains of one-celled animals
C、alternating cold and warm seasons
D、changes in distance of the earth from the sun
答案
A
解析
事实细节题。第三段结尾指出:“地球轨道结构的变化导致了冰川期。”
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0
大学英语四级
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