Researchers discovered that plants______with a virus give off a gas that activates disease

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Researchers discovered that plants______with a virus give off a gas that activates disease resistance in neighboring plants.

A.contracted

B.infected

C.loaded

D.prescribed

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答案解析

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  • 正确答案:B
    infectwith/contract“染上……病”,常接disease,virus一类的词,但contract是及物动词,不需要任何介词;load“装载”,虽然可以接with,但意思是“用……装载”;prescribe“开处方,指示,规定”,如:prescribeforadisease“为某疾病开药方”,prescribemedicinetoapatient“给病人开药”。按句子意思和惯用结构搭配,应选infected。题句意:“研究人员发现,感染上病毒的植物散发出一种气体,这种气体使得周围的植物产生抗病能力。”