The doctor tried to do an experiment to find out the________of the medicine on the mice.

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问题 The doctor tried to do an experiment to find out the________of the medicine on the mice.

选项 A、cause
B、result
C、reason
D、effect

答案D

解析 本题考查名词词义辨析。A原因;B结果,后果;C原因,理由;D影响。只有D符合句意。故选D。句意为:医生想做一个试验来找出这种药对小老鼠有什么影响。
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