试题与答案

下列与化学反应能量变化相关的叙述正确的是 [ ] A.生成物的总能量一定低于反应

题型:选择题

题目:

下列与化学反应能量变化相关的叙述正确的是 [ ]

A.生成物的总能量一定低于反应物的总能量

B.放热反应的反应速率总是大于吸热反应的反应速率

C.应用盖斯定律,可计算某些难以直接测量的反应热

D.同温同压下,H2(g)+Cl2(g)=2HCl(g)在光照和点燃条件下的△H不同

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C

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Ladies and gentlemen,

Welcome to England! The weather of England is very changeable (易变的). It can be rainy, sunny, cloudy, windy, stormy, warm, foggy, or cold at any time of the year. If it is raining when you get up in the morning, it can be hot and dry by the afternoon. It may be sunny when you get up, but when you go out, it may be rainy. So don’t forget to take an umbrella with you. The west of England is wetter than the east, and the north is cooler than the south. You should be ready for any kind of weather.

In England, shops are usually open from 9.00 a.m. to 5.30 p.m. On Sundays, some shops are open from 10.00 a.m. to 4.00 p.m. But a lot of shops are closed. Banks, museums or other places are open from 10.00 a.m. to 5.00 p.m. You can go to the parks at any time.

All the cities have buses, trains and taxis. People wait in line for buses and they are unhappy if you push in at the front. Don’t forget that traffic goes on the left.

Be careful with yourselves when you travel in England!

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