A-A+
Chimpanzees are frequently used as stand-ins f
问题详情
Chimpanzees are frequently used as stand-ins for human beings in experiment.
A．partners
B．role-models
C．stand-bys
D．substitute
参考答案
正确答案：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。
