下列溶液的溶质都是强电解质，这些溶液中的Cl—的物质的量浓度与150mL lmol·L-1CaCl2溶液中的Cl—物质的量浓度相等的是( )
| A．150 mL 1 mo1．L-l NaCl溶液 | B．75 mL 2 mol·L—1MgCl2溶液 |
| C．150 mL 2 mo1．L—1KCl溶液 | D．75 mL 1 mol·L-1A1C13溶液 |
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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