镉镍可充电电池在现代生活中有广泛应用，它的充、放电反应按下式进行：
Cd+2NiOOH+2H2O
Cd（OH）2+2Ni（OH）2
如果利用该电池精炼铜，则粗铜应连接的极是
| A．NiOOH | B．Ni（OH）2 | C．Cd | D．Cd（OH）2 |
相关试题
—— Do you mind my opening the window? It’s a bit hot in here.
—— ______ , as a matter of fact
| A．Go ahead | B．Yes, my pleasure |
C．Yes, I do | D．Come on |
It’s high time you had your hair cut ; it’s getting _______ . 
| A．too much long | B．much too long |
C．long too much | D．too long much |
My friend showed me round the town, ______ was very kind of him. 
| A．which | B．that | C．where | D．it |
They use computers to keep the traffic _______ smoothly.
| A．being run | B．run | C．to run | D．running |
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