已知反应A+B=C+D的能量变化如图所示，下列说法正确的是
| A．形成产物C和D的化学键放出的总能量高于断开反应物A和B的化学键所吸收的总能量 |
| B．该反应只有在加热条件下才能进行 |
| C．反应物的总能量高于产物的总能量 |
| D．该反应为吸热反应 |
相关试题
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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| A．being run | B．run | C．to run | D．running |
If you leave the club, you will not be_____back in .
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