将0.1mol两种气态烃(其中一种为炔烃)组成的混合气体完全燃烧后得3.36L(标况)CO2和3.6gH2O。则这两种烃的物质的量之比说法正确的是 ( )
| A．1:1 | B．1:2 | C．1:3 | D．无法计算 |
相关试题
有西方学者认为：“近代世界赖以建立的种种发明与发现可能有一半来源于中国”。传入欧洲并对“近代世界”的到来产生了重大影响的中国科技成就是（ ）
| A．地动仪 | B．造纸术 | C．雕版印刷术 | D．罗盘针 |
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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