现在MgCl2 AlCl3 CuCl2 FeCl3 NH4Cl五种溶液只用一种试剂把它们区别开，这种试剂是（ ）
| A．氨水 | B．AgNO3 | C．浓NaOH | D．NaCl |
相关试题
Jenny nearly missed the flight______ doing too much shopping.
| A．as a result of | B．on top of | C．in front of | D．in need of |
The CDs are on sale! Buy one and you get ______ completely free.
| A．other | B．others | C．one | D．ones ks |
I’m sure that your letter will get______ attention. They know you’re waiting for the reply. 
| A．continued | B．immediate | C．careful | D．general |
All the dishes in this menu, ______ otherwise stated, will serve two to three people. 
| A．as | B．if | C．though | D．unless |
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