下列离子方程式正确的是 （ ）
| A．制取Fe(OH) 3胶体：Fe3++3H2O |
| B．1 mol/L的NaAlO2溶液和2.5 mol/L的盐酸等体积混合：2AlO2-+5H+= Al(OH) 3↓+Al3++H2O |
| C．向碘化钾溶液中通入臭氧：O3+2I一+3H2O |
| D．等物质的量的Ba(OH) 2与(NH4)2Fe(SO4) 2在溶液中反应：Ba2++2OH-+2NH4++SO42- |
相关试题
All the dishes in this menu, ______ otherwise stated, will serve two to three people. 
| A．as | B．if | C．though | D．unless |
The children loved their day trip, and they enjoyed the horse ride ______.
| A．most | B．more | C．less | D．little |
Progress______ so far very good and we are sure that the work will be finished on time.
| A．was | B．had been | C．has been | D．will be |
Charles was alone at home, with_______ looking after him.
| A．someone | B．anyone | C．not one | D．no one |
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