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The first paragraph of the text deals mainly with the earth atmosphere’s ______.
The first paragraph of the text deals mainly with the earth atmosphere’s ______.
游客
2024-03-04
56
管理
问题
The first paragraph of the text deals mainly with the earth atmosphere’s ______. [br] The best definition of "biosphere" as it is used in the text is ______.
选项
A、the protective envelope formed by the atmosphere around the living earth
B、part of the earth and its atmosphere in which life can exist
C、the living things on earth whose existence is made possible by circulation of the atmosphere
D、the circulation of the atmosphere’s contribution to life on earth
答案
B
解析
概念理解题。根据第一段，生物圈是指能够维持生命的地球区域。只有B项符合这个定义。
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