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As we all know ,Columbus         America and Edison          light bulbs.

A. discovered ; invented                           B. invented ; discovered

C. discovered ; discovered                         D. invented ; invented

 

A

【解析】

试题分析:句意:我们都知道,哥伦布发现了美洲,爱迪生发明了电灯。discover发现,原来就有后来被人们发现; invent发明,创造以前没有的东西,根据句意,故选A

考点:考查词义辨析

 

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