2. 外语
  3. Edison tested more than one thousand materials to see if they could_____electric current and glow.

Edison tested more than one thousand materials to see if they could_____electric current and glow.

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问题 Edison tested more than one thousand materials to see if they could_____electric current and glow.
选项 A、bring
B、make
C、carry
D、produce
答案C
解析 A项“带来”，具有方向性；B项“制造”；C项“传送，传播”；D项“产生”。C项为正确答案。
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