Scientists have made a __________ in their combat against the AIDS.

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问题 Scientists have made a __________ in their combat against the AIDS.

选项 A、breakup
B、breakdown
C、breakthrough
D、breakout

答案C

解析 科学家们在治疗艾滋病方面取得了突破。本题是考查形似合成词的词义。breakup“崩溃,停止,解散”; breakdown“(机器等的)破损,故障”;breakthrough“突破性的进展,突破点”;breakout“爆发;越狱,逃亡”。
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