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【单选题】
下述关于活化能的说法中,正确的是(    )。
A.
活化能与反应途径无关    
B.
活化能是活化分子具有的最低能量
C.
温度升高,活化能降低    
D.
一般说来,活化能越小,反应速率越快
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A.
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B.
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