______ to nuclear radiation, even for a short time, may influence genes in human bodies.
A.ExposedB.Being exposedC.To exposeD.Having exposed
B

試題分析:考查動(dòng)名詞做主語(yǔ),分析句子成分發(fā)現(xiàn)even for a short time, 是插入語(yǔ),may influence是謂語(yǔ),前面的部分應(yīng)該是主語(yǔ),be exposed to“暴露于”,要用動(dòng)名詞Being exposed to,句意是:暴露于核輻射中甚至很短時(shí)間都會(huì)影響人體的基因。選B。
點(diǎn)評(píng):做題時(shí)要會(huì)發(fā)現(xiàn)句子結(jié)構(gòu),如果有插入語(yǔ)可以先忽略,判斷所填部分是什么成分,還有要注意是主動(dòng)還是被動(dòng)。
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