Lately some scientists are experimenting _____ white mice to _____ this kind of medicine. [ ]A. on,

题目简介

Lately some scientists are experimenting _____ white mice to _____ this kind of medicine. [ ]A. on,

题目详情

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
题型:单选题难度:中档来源:0106 期末题

答案

C

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