A:正极Cu,负极Al,S为浓HNO3
B:正极Ag,负极Fe,S为CuSO4
C:正极Al,负极Cu,S为浓HNO3
D:正极Zn,负极Cu,S为CuSO4
甲、乙和丙,一位是山东人.一位是河南人,一位是湖北人.现在只知道:丙比湖北人年龄大,甲和河南人不同岁.河南人比乙年龄小.由此可以推知( )
We ____ ____ ____ Kang kang's birthday party. All of us had a good time.