问题
选择题
I am good at an e-card. [ ]
A. make
B. makes
C. making
答案
答案：C
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I am good at an e-card. [ ]
A. make
B. makes
C. making
答案：C
某原电池总反应为：Cu+2Fe3+==Cu2++2Fe2+下列能实现该反应的原电池是
| A | B | C | D | |
| 电极材料 | Cu、Zn | Cu、Ag | Cu、C | Fe、Zn |
| 电解液 | FeCl3 | Fe2(SO4)3 | Fe(NO3)2 | CuSO4 |