Air, or( )is called atmosphere, surrounds the whole earth.A、itB、thatC、whichD、

游客2025-03-07 20

问题 Air, or( )is called atmosphere, surrounds the whole earth.

选项 A、it
B、that
C、which
D、what

答案 D

解析本题考查同位语从句和主语从句。

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