某Na2CO3、NaAlO2的混合溶液中逐滴加入1mol·L-1的盐酸，测得溶液中的CO32-、HCO3-、AlO2-、Al3+离子的物质的量与加入盐酸溶液的体积变化关系如图所示。则下列说法正确的是 （ ）
| A．原混合溶液中的CO32-与AlO2-的物质的量之比为1：2 |
| B．V1：V2=1：5 |
| C．a曲线表示的离子方程式为：AlO2-+H++H2O=Al（OH）3↓ |
| D．M点时生成的CO2为0.05mol |
相关试题
Charles was alone at home, with_______ looking after him.
| A．someone | B．anyone | C．not one | D．no one |
It is often ______ that human beings are naturally equipped to speak.
| A．said | B．to say | C．saying | D．being said |
I can’t leave. She told me that I ______ stay here until she comes back.
| A．can | B．must | C．will | D．may |
—— Do you mind my opening the window? It’s a bit hot in here.
—— ______ , as a matter of fact
| A．Go ahead | B．Yes, my pleasure |
C．Yes, I do | D．Come on |
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