下列各组中，每种电解质溶液电解时只生成氢气和氧气的是
| A．NaOH、H2SO4、 Ba(OH)2 | B．NaOH、CuSO4、 H2SO4 |
| C．HCl、 CuCl2、 Ba(OH)2 | D．NaBr、 H2SO4、 Ba(OH)2 |
相关试题
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 |
If you leave the club, you will not be_____back in .
| A．received | B．admitted | C．turned | D．moved |
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