某气态烷烃与丙炔的混合气体22.4L（标准状况），完全燃烧后生成121 g CO2和40.5 g H2O，则原混合气体中烷烃的化学式为（ ）
| A．CH4 | B．C2H6 | C．C3H8 | D．C4H10 |
相关试题
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 |
My friend showed me round the town, ______ was very kind of him. 
| A．which | B．that | C．where | D．it |
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