下列离子方程式正确的是
| A．向次氯酸钙溶液通入SO2：Ca2++2ClO−+SO2+H2O＝CaSO3↓+2HClO |
| B．向NH4A1(SO4)2溶液中滴入Ba(OH)2溶液恰使SO42－沉淀完全 NH4＋＋Al3＋＋2Ba2＋＋2SO42－＋4OH－＝Al(OH)3↓＋NH3·H2O＋2BaSO4↓ |
| C．向Mg(HCO3)2溶液中加入过量的NaOH溶液：Mg2++2HCO3－＋2OH－＝MgCO3↓＋CO32－+2H2O |
| D．向硝酸银溶液中滴加稀氨水至过量：Ag+ + NH3•H2O＝AgOH↓ + NH4+ |
相关试题
She brought with her three friends, none of ______ I had ever met before. 
| A．them | B．who | C．whom | D．these |
I tried phoning her office, but I couldn’t _______. 
| A．get along | B．get on | C．get to | D．get through |
His sister left home in 1998, and _______since. 
| A．had not been heard of | B．has not been heard of |
C．had not heard of | D．has not heard of |
What do you mean, there are only ten tickets? There _____ be twelve
| A．should | B．would |
C．will | D．shall |
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