下列区域叙述不正确的是（ ） A．俄罗斯自然资源丰富，重工业发达 B．南极地区气

阅读理解。

     John Smith, an office worker, lives in Washington. He inherited (继承) a million dollars when he was 23,

but he wasn't happy at all. When his college friends were looking for their jobs, he didn't have to. Jack decided

to living a simple life like everyone else. He gave $l0,000 of his money to a charity (慈善机构) to help poor

children live a better life. Today he is 36. He still wears cheap shoes and clothes and drives a small car only,

but he is very happy. 

     Up to now John has helped some children from poor countries all over the world, by sending them each

$200 a month. The money was used for the children's study, food, medicine and clothing. John receives a

report each year on the children's progress. They can write to each other, but usually the children do not

speak English.

     When John first heard about these children,he wanted to help them. "It was nothing special," he said.

"Until I went to these countries and met the children I was helping, I didn't know anything about their life.

"Once John went to meet a little girl in Africa. He said that the meeting was very exciting. "When I met her,

I felt very, very happy." he said. "And I saw that the money was used for a good cause. It brought me

happiness. I want to do everything I can to go on helping those children."

1. John didn't need to look for a job _____.[ ]

A. before he went to college

B. after he went to Africa

C. because he got a lot of money

D. before he received a report

2. John has sent them each $200 a month to help some poor children _____. [ ]

A. near Washington

B. in European countries

C. only in Africa

D. all over the world

3. John learned about the children's progress by _____. [ ]

A. visiting them each year

B. getting a report every year

C. staying with them

D. talking to them in English

4. The underlined words "for a good cause" means "_____" in Chinese. [ ]

A. 施舍

B. 善事

C. 优惠

D. 赏赐

5. What's the main idea of the story? [ ]

A. Help others,and you will feel happy.

B. It's necessary to write letters to poor children.

C. Live a simple life,and you can give others help.

D. It's the most important to help the children in Africa.

加油站使用（）加油机时不用安装双门底阀。

A、潜油泵

B、叶片泵

C、齿轮泵

D、刮片泵

战略的构成要素是（）

A、战略环境、战略格局、战略手段

B、战略目的和任务、战略方针、战略环境

C、战略环境、战略方针、战略手段

D、战略目的和任务、战略方针、战略手段

额定热功率大于或等于（）的热水锅炉，给水应除氧。

A、1.4MW

B、2.8MW

C、4.2MW

D、7.0MW

叙述CRH2型动车组二级（专项）修空气弹簧高度测量作业内容？