下列叙述正确的是
| A．将H2S通入FeCl3溶液中会产生淡黄色沉淀，继续通则会产生黑色沉淀 |
| B．在中和热测定的实验中，将NaOH溶液和盐酸混合反应后的最高温度作为末温度 |
| C．分离Na2CO3溶液和CH3COOC2H5常用蒸馏法 |
| D．能使湿润的KI淀粉试纸变蓝的气体一定是Cl2 |
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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