下列实验过程中产生沉淀的物质的量(Y) 与加入试剂的量(X)之间的关系正确的是（ ）
| A．向AlCl3溶液中逐滴加入NaOH溶液至过量且边滴边振荡 |
| B．向NaAlO2溶液中滴加稀盐酸至过量且边滴边振荡 |
| C．向NH4Al(SO4)2溶液中逐滴加入氢氧化钠溶液直至过量 |
| D．向NaOH、Ba(OH)2、NaA1O2的混合溶液中逐渐通入二氧化碳至过量 |
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