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单选题专四

2010-12-07

回答第50空。

A．exteriors

B．outside

C．surfaces

D．coverings

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参考答案

C

答案解析

【解析】由句意可知，病毒残留在物体的表面，故C项正确。
【点睛】词汇辨析题。D项指“遮盖物”，可首先排除；A、B两项虽都有“外部”之义，但并不强调物体的“外表而”故也应排除。

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