单选题：（　） Americans fully realized what Edison's inventions meant

题目分类：英语
题目类型：单选题
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（　） Americans fully realized what Edison's inventions meant when they __________ . A．heard of his death
B．heard of the plan to honor him
C．first used electric power
D．tried to carry out the plan

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分类：英语题型：单选题

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分类：英语题型：单选题

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