問題詳情

50. What does the passage tell us about heat?
(A) It is sometimes needed for a chemical reaction.
(B) It is always the product of a chemical reaction.
(C) It is needed to change the atoms in a material.
(D) It does not affect chemical reactions in any way.

參考答案

答案:C
難度:非常困難0.125
統計:A(1),B(2),C(3),D(2),E(0)

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