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【题目】— Who the first practical light bulb?
— Thomas Edison.
A.developed
B.discovered
C.carried

【答案】A
【解析】句意:——谁……第一个实用的电灯泡?——汤姆斯.爱迪生。A.发展,研发;B发现; C. 搬动。develop是指没有存在过的,被创造出来的东西,而discover是这个东西本身存在,只是最后被人发现了而已。电灯泡以前是未存在过的,故应该选A。

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