下列关于突发事件的特点表述错误的是（） A.突然性 B.破坏性 C.规律性 D.群体

阅读理解。

     The idea of daylight saving time started with an American named Benjamin Franklin (1706-1790). He

explained how a lot of the money spent on candles used for light (this was before electricity) could be saved

if everyone woke up earlier and went to bed earlier.

     Even though Franklin's idea had a clear meaning, most people didn't want to get up earlier than they had

to. Who would?

     It was not until 1907 that an Englishman named William Willet came up with a way to "make" the sun set

later. His idea was to turn clocks forward by 20 minutes on each of the four Sundays in April, for a total of

80 minutes.

     William's idea was laughed at, at first. But when World War I started in 1914. Many countries decided they

had to save energy for the war.

     Daylight saving time has other uses. The more time you spend outside playing, the less time you are spending

in front of the computer or the TV. These things also use energy.

     Also, daylight saving time sometimes causes problems. For example, China used it in 1986-but stopped it in

1991. That was because me temperatures are quite different from North to South and time from East to West.

     If the people from northwest part of China use daylight saving time. sometimes they have to get up to work

when it is not very bright outside. That will cause some trouble for them.

     Still, most parts of the world do have daylight saving time, and most people look forward to the extra hour

of evening light.

1. Why did Franklin give the idea of daylight saving time?

A. To save the money.

B. To save time.

C. To wake up earlier.

D. To go to bed earlier.

2. In what year was the idea of daylight saving time put in use?

A. In 1907.

B. In 1914.

C. In 1986.

D. In 1991.

3. If it is 6:00 now, which is Willet's idea time?

A. 5:40.

B. 6:20.

C. 6:40.

D. 7:20.

4. Why is daylight saving time not used in China now? Because _____.

A. people wouldn't like to get up earlier

B. the temperatures are quite different

C. the country is large

D. the time is quite different

人类对地球的认识经历了漫长的过程，下列对地球的描述，正确的是（　　）

A．人类对地球形状的认识经历了浑天说、盖天说、地球是球体等阶段

B．地球是一个两极稍鼓，赤道略扁的不规则球体

C．我们可以通过日月星辰的东升西落证明地球是球体

D．地球的赤道半径比极半径约长21千米

理学发展到南宋，谁是集大成者？

方药配伍寓有“治风先治血，血行风自灭”之意的方剂是（）

A.大定风珠

B.小活络丹

C.槐花散

D.消风散

E.十灰散

化合物A可由环戊烷经三步反应合成：反应1的试剂与条件为（）反应2的化学方程式为（）反应3可用的试剂为（）。