已知单质A能从溶液中置换出单质B。下列分析不正确的是
A．当A、B都是金属，A的还原性一定比B强
B．当A、B都是非金属时，A的非金属性一定比B强
C．当A是金属时，B可能是金属，也可能是非金属
D．当A是非金属时，B可能是非金属，也可能是金属
相关试题
Edward, you play so well. But I ______ you played the piano. 
| A．didn’t know | B．hadn’t known |
C．don’t know | D．haven’t known |
She brought with her three friends, none of ______ I had ever met before. 
| A．them | B．who | C．whom | D．these |
I tried phoning her office, but I couldn’t _______. 
| A．get along | B．get on | C．get to | D．get through |
His sister left home in 1998, and _______since. 
| A．had not been heard of | B．has not been heard of |
C．had not heard of | D．has not heard of |
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