Before the drug is used on human beings, experts have to ______ dogs.

admin2012-02-26  33

问题 Before the drug is used on human beings, experts have to ______ dogs.

选项 A、be experimented
B、experiment
C、experiment with
D、experiment on

答案D

解析 experiment on“对……进行实验”;experiment为不及物动词。
转载请注明原文地址:https://jikaoti.com/ti/gpnYFFFM
0

随机试题
最新回复(0)