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18.The researehers delermine what type of plants the virus can infect(感染) and       insects can carry the virus.(  )
A.thoseB.whyC.whichD.how

分析 研究人员确定了这个病毒能感染哪些植物以及哪些昆虫可以携带这个病毒.

解答 答案:C
根据题干"___ insects can carry the virus"是"delermine"宾语从句,结合what type of 可判断此处意思为"哪些昆虫",故选C.

点评 本题考查疑问代词.要求考生熟练掌握不同疑问代词的用法并能在具体语境中使用.

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