挑战习题
1/5单选题
难度:

1.

下列物质的变化中,只有加酸才能一步实现的是(  )


A

CaCO3→CO2

B

Zn→ZnSO4

C

CuO→CuCl2

D

KOH→KCl

提示1:
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正确答案:Qw==
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