2. 外语
  3. Thomas Edison worked ______ hours a day so he called himself a "two-shift man". Of all the inventions, ______ was probably the

Thomas Edison worked ______ hours a day so he called himself a "two-shift man". Of all the inventions, ______ was probably the

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问题 Thomas Edison worked ______ hours a day so he called himself a "two-shift man".
Of all the inventions, ______ was probably the most important for civilization.
选项 A、the vote recorder
B、the stock ticker
C、the light bulb
D、the motion picture camera
答案C
解析 根据第一段可以推断爱迪生对人类社会贡献最大的发明是电灯。
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