下列关于热化学反应的描述中正确的是
| A．HCl和NaOH反应的中和热△H＝－57.3kJ/mol，则H2SO4和Ca(OH)2反应的中和热△H＝2×(－57.3)kJ/mol |
| B．1mol甲烷燃烧生成气态水和二氧化碳所放出的热量是甲烷的燃烧热 |
| C．需要加热才能发生的反应一定是吸热反应 |
| D．CO(g)的燃烧热是283.0kJ/mol，则2CO2(g) ＝2CO(g)＋O2(g)反应的△H＝2×283.0kJ/mol |
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 |
If you leave the club, you will not be_____back in .
| A．received | B．admitted | C．turned | D．moved |
What I need is_____ book that contains ______ABC of oil painting.
| A．a; 不填 | B．the; 不填 | C．the; an | D．a ; the |