移位前先思考

阅读理解。

     Dr. Albert Schweitzer was a jungle doctor in Africa. He was born in France. He had learned to play

the piano since he was five and he was a very good musician. He decided to be a doctor when he was 30

years old. Then he studied medicine for eight years. After that, he asked to be sent to Africa in 1913.

     Dr. Schweitzer took big boxes of medicine with him to Africa. He had to go through a lot of dangerous

places. At first the new white doctor was not welcome, but soon the people of Africa understood that he

was their friend and they helped him build his first small hospital near a river. Many people came to the

hospital. Dr. Schweitzer worked day and night.

     When he ran out of money and needed more medicine t he would go back to Europe to make money

by playing music. Then he would return to Africa. Later he built a bigger hospital. He spent most of his life

in Africa, not only helping sick people but also teaching the people how to help each other.

     During World War I, he was sent to prison. He found that war was more terrible than disease (疾病).

When the war was over, he made a speech everywhere to propose (提倡) peace and respect (尊敬) for

lives. In 1952, he was named winner of the Nobel Peace Prize.

1. Albert Schweitzer was about ________ years old when he went to Africa.

A. 30

B. 36

C. 38

2. People in Africa were ________ to him when Schweitzer got there at first.

A. kind

B. unfriendly

C. polite

3. Schweitzer's first hospital in Africa was ________.

A. far from rivers

B. built by his friends who came with him

C. built with the help of people in Africa

4. When Schweitzer ran out of money in Africa, ________.

A. he worked for longer hours

B. he went back to Europe and made money by playing music

C. people in Africa helped him

5. Which is TRUE according to the passage?

A. Schweitzer studied medicine for seven years.

B. Schweitzer was born in Africa.

C. Schweitzer was named winner of the Nobel Peace Prize in 1952.

如图所示，甲图为左右宽度为x、上下宽度为y的矩形匀强电场，乙图为左右宽度为x、上下宽度为y的矩形匀强磁场，电场方向和磁场方向已标出．一带电粒子(不计重力)从甲图中的左上角开始以速度v水平向右沿电场边界且垂直于电场方向进入电场，经过时间t₁恰好从电场的右下角射出；另一带电粒子(不计重力)从乙图中的左上角开始也以速度v水平向右沿磁场边界且垂直于磁场方向进入磁场，经过时间t₂恰好也从磁场的右下角射出．关于t₁、t₂的大小关系，下列判断中正确的是

A．t₁＝t₂  

B．t₁>t₂

C．t₁<t₂  

D．无法比较大小

深圳某企业从香港进口一批原产于马来西亚的一批不锈钢餐刀和其他不锈钢制品(属于法检商品，列入《自动进口许可管理目录》)，运载该批货物的运输工具2008年5月26日从深圳口岸申报进境，收货人于2008年6月1日向深圳海关传送报关单电子数据，海关当天受理。该公司发现，该批货物有多处申报差错，必须要撤销原电子数据报关单，故向海关申报并经海关审核同意于2008年6月2号撤销原电子数据报关单，遂于6月20日重新向海关申报，海关当天受理申报并发出现场交单通知，收货人6月21日向海关提交了相应的纸质单证。

该批货物进口申报应符合下列海关规定( )。

A．应以电子数据报关单向海关申报，海关审结后，再向海关提交纸质报关单并随附其他单证

B．应同时以电子数据报关单和纸质报关单向海关申报，然后由海关进行电子审单

C．应先向海关提交纸质报关单，由海关预审，再以电子数据报关单向海关正式申报

D．由发货人或其代理人选择使用电子数据报关单或纸质报关单向海关申报

在建筑材料及制品的燃烧性能等级中，不燃材料（制品）的燃烧性能等级为（）级。

A.A

B.B1

C.B2

D.B3