下列离子方程式正确的是
| A．向氯化铝溶液中加入过量氨水：Al3+＋4OH－＝AlO2—＋2H2O |
| B．向硅酸钠溶液中滴加盐酸制取硅酸：SiO32—+2HCl==H2SiO3↓+2Cl— |
| C．Ba(OH)2溶液中滴加少量NH4HCO3溶液：NH4＋＋HCO3－＋2OH－＋Ba2+＝NH3·H2O＋H2O＋BaCO3↓ |
D．用银氨溶液检验乙醛中的醛基：CH3CHO＋2Ag(NH3)2＋＋2OH－ CH3COO－＋NH4＋＋2Ag↓＋3NH3＋H2O |
相关试题
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 |
What I need is_____ book that contains ______ABC of oil painting.
| A．a; 不填 | B．the; 不填 | C．the; an | D．a ; the |
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