2. 外语
  3. Humans should not develop their economy at the ______ of the ecological environment.

Humans should not develop their economy at the ______ of the ecological environment.

admin2011-02-26  89
问题 Humans should not develop their economy at the ______ of the ecological environment.
选项 A、destruction
B、pollution
C、expense
D、mercy
答案C
解析
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