下列各组离子中，在溶液里不能大量共存的是
| A．K+、Na+、OH-、 SO42- | B．Fe3+、K+、Cl-、 SCN- |
| C．Na+、K+、CO32-、NO3- | D．H+、Al3+、SO42-、NO3- |
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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