某化学式为C3H6O2的有机物的PMR谱有三个信号蜂，其强度比为3∶2∶1，则该有机物的结构简式不可能是
| A．CH3CH2COOH | B．CH3COOCH3 |
| C．HCOOCH2CH3 | D．CH3COCH2OH |
相关试题
—— 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 |
They use computers to keep the traffic _______ smoothly.
| A．being run | B．run | C．to run | D．running |
粤公网安备 44130202000953号