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原电池电动势的测试 (20分) ( 1 )硫酸铜和硫酸锌组成的原电池装置测试中,如果导线与电极或伏特计间接触不良,对电动势会产生什么影响?为什么? ( 2 )在硫酸铜的烧杯中加入浓氨水,电动势变 ( 3 )继续在硫酸锌的烧杯中加入浓氨水,电动势变 ( 4 )比较三次测量结果,说明浓度对电极电势的影响。
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【简答题】(A) 在 II 栏中找出与 I 栏中相对应的句子 I II 6. ( ) I’d like you to meet my friend, John. A. Yes, I do. I like the support from a group. 7. ( ) Is she your mother’s si...
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