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问题

What’S the main idea of the passage7


What’S the main idea of the passage7

  • ALaser light treatment of heart disease should take the place of the traditional operatlon.
  • BLaser light treatment has been proved better and more effective than the traditional operation.
  • CMore advanced technology should be encouraged to try on.
  • DLaser light treatment of heart disease still needs’more research.
参考答案
参考解析:

通读全文,特别是最后一段后半部分,可知正确答案应是D项。

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