Lately some scientists are experimenting ___________ white mice to ____________
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Lately some scientists are experimenting ___________ white mice to ____________ this kind of medicine.A.on,try on | B.with, test on | C.on ,test out | D.with,carry out |
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答案
C |
解析
句意:最近一些科学家正在在白鼠身上做实验来检测这种药。短语:experiment on 在什么上做实验,test out 检测,测试,所以选C。 |
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