Na2CO3俗名纯碱，下面是对纯碱采用不同的分类法的分类，不正确的是（ ）
| A．Na2CO3是盐 | B．Na2CO3是碱 |
| C．Na2CO3是钠盐 | D．Na2CO3是碳酸盐 |
相关试题
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 |
It’s high time you had your hair cut ; it’s getting _______ . 
| A．too much long | B．much too long |
C．long too much | D．too long much |
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