2. 外语
  3. Air, or( )is called atmosphere, surrounds the whole earth.

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

admin2016-04-30  36
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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