2. 外语
  3. According to the passage, scientists used to think that the X-rays were produced by ______. Which is the best title for the pas

According to the passage, scientists used to think that the X-rays were produced by ______. Which is the best title for the pas

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问题 According to the passage, scientists used to think that the X-rays were produced by ______.
Which is the best title for the passage?
选项 A、Scientists Created X-rays in a Lab.
B、Sparks, a New Way to Produce X-rays.
C、Runaway Breakdown Triggers New Questions.
D、Scientists Surprised by X-rays from Lab Lightning.
答案D
解析 本题考查对文章总体的理解。理解全文，A、C是错误选项；B只是文章内容的一个方面；D更适合作为文章的标题。
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