2. 外语
  3. Chimpanzees are frequently used as stand-ins for human beings in experiment.

Chimpanzees are frequently used as stand-ins for human beings in experiment.

admin2010-02-21  47
问题 Chimpanzees are frequently used as stand-ins for human beings in experiment.
选项 A、partners
B、role-models
C、stand-bys
D、substitute
答案D
解析 partner合伙人，股东；role-model典型；stand-by后备人员；substitute替身，替代品； stand-ins替代品。
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