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.

admin2013-01-18  20
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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