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Gaokao Physics Practice Question

下列说法中正确的是

  1. A.物体温度降低, 其分子热运动的平均动能增大
  2. B.物体温度升高, 其分子热运动的平均动能增大
  3. C.物体温度降低, 其内能一定增大
  4. D.物体温度不变, 其内能一定不变

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