【題目】—Have you heard about the event of vaccine(疫苗)?

—Yes. It has caused a(n) _________ influence on medicine safety.

A. active B. common

C. medical D. unexpected

【答案】D

【解析】

試題分析:句意:你聽說疫苗事件了嗎?——是的,它對醫(yī)藥安全產(chǎn)生了不可預(yù)期的影響。A. active 積極的;B. common 普通的;C. medical 醫(yī)學(xué)的;D. unexpected意外的,想不到的。結(jié)合句意可知,答案為D。

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