如图装置,电流表G发生偏转,同时A极逐渐变粗,B极逐渐变细,C为

如图装置,电流表G发生偏转,同时A极逐渐变粗,B极逐渐变细,C为电解质溶液,则A、B、C应是下列各组中的(    )

 

A

B

C

A

Zn

Cu

H2SO4

B

Cu

Zn

H2SO4

C

Fe

Ag

AgNO3

D

Ag

Fe

AgNO3

答案

D

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