右图为一个生态系统中某些生物的相对数量关系，这些生物构成了一条食物链。在这条食物

阅读理解。

     Many people have to work on the weekend. Some people do not mind. Others think it is terrible.

One man thinks that working on the weekend can be dangerous. He is Graham Coates. Mr Coates works in an office in Brighton, England.

     On Saturday, May 24, 1986, he went to the office to do some work. When he got on the lift(电梯), it stopped between floors. Mr Coates could not get out of the lift. He started to shout, but no one heard him. Then Mr. Coats remembered that it was a holiday in England. No one was going to come to work until

Tuesday.

     There was nothing for him to do. He had to wait until one of his workmates came to work and found

him. With nothing to eat or drink, Mr Coats ended up sleeping for most of the day.

Now Mr. Coates says, "I only use lifts if they have telephones in them."

1. Mr. Coates thinks working on the weekend is_____.

A. interesting

B. terrible

C. happy

D. unhappy

2. Mr. Coates stayed in the lift for_____.

A. about twenty hours

B. nearly two days

C. one week

D. more than sixty hours

3. When Mr. Coates got out of the lift he_____.

A. was cold, weak, hungry and tired

B. wouldn't work there any more

C. said "I only use lifts if they have telephones in them."

D. went home at once

4. Why could Mr. Coates not get out of the lift? Because _____.

A. it was broken

B. it was the weekend

C. it was in an office

D. it was a holiday

5. In the lift, there was_____.

A. water

B. beer

C. telephone

D. nothing

30000膨胀机密封气压力为（）时为油泵的启动条件。

A、＜0.18MPa

B、＞0.04MPa

C、＞0.03MPa

如图所示电路L₁、L₂、L₃是三盏相同的灯泡，电压表V₁的示数为6V，电压表V₂的示数也是6V。

问：①L₁、L₂、L₃的连接方式是怎样的？②电压表V₁、V₂分别测的是哪段电路两端电压？③A、B间的电压值多大？

去除盐水中的SO₄^2-有哪几种方法（）

A.钙盐法

B.钡盐法

C.冷冻法

D.沉降法

“十三五”防灾减灾要坚持四项原则，其中之一是要（），将防灾减灾建设与经济社会转型相结合，将防灾减灾战略纳入国民经济与社会发展规划、城乡建设规划。

A.综合统筹，各个击破

B.综合统筹，绿色发展

C.综合统筹，协调推进

D.地方统筹，各自为政