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问题

Chinese and Russian scientists have re


Chinese and Russian scientists have reposed that in places ______stress is building up, the radon levels of the water build up too.

  • A what
  • B that
  • C which
  • D where
参考答案
参考解析:

[解析] 中俄科学家报告指出凡是气压增大的地方,水中氡含量也会增大。where引导定语从句修饰places。

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