抽油机井碰泵操作的作用是什么？

阅读理解。

     Brad Pitt and Angelina Jolie have given $500,000 to help the town of Joplin -a town near the

Mississippi River, where Pitt's mother went to school recover from a huge tornado (龙卷风)that struck

on May 22, 2011.

     The couple made the donation through the Jolie-Pitt Foundation on Thursday to help rebuild the town

of Joplin after about 30% of the buildings were destroyed by the tornado. Over 150 people were killed.

      "The Joplin community faces great challenges ahead," said Brad. "Having spent most of my childhood

there, I know these people to be hardworking, humble and especially resilient.

     "The locally based Community Foundation of the Ozarks will be working shoulder to shoulder with

these Joplin citizens for long to rebuild their lives. We, too, hope to further help with these rebuilding

efforts."

     "Last year 42 million people worldwide were hurt by natural disasters," added Angelina. "So often,

these disasters seem far away; but now, the need is right here at home for thousands of people. Our

hearts go out to the families in Joplin who have lost so much."

     The Community Foundation of the Ozarks was founded in 1973 and has since grown to include 43

branch community foundations. The Foundation's task is to improve the quality of life in the Missouri

Ozarks area through resource development, community grant making, working together, and public

leadership.

     "We had a call in the first day or two afterward from an organization representing them," said Brian

Fogle, president of the Community Foundation of the Ozarks. "They made several calls afterwards, but

we learned that they made a donation.

1. Where did the disaster most probably happen?

A. in Britain  

B. in the USA  

C. in Australia  

D. in China

2. Brad Pitt and Angelina Jolie donated $500,000 after the disaster_______.

A. by post        

B. in the flesh  

C. through a foundation  

D. through the local Red Cross

3. The best title for the passage is______.

A. A disaster by a huge tornado in Joplin      

B. Rebuilding efforts after the disaster  

C. The Community Foundation of the Ozarks  

D. A donation from the Pitts

船舶在弯曲水道顺流抛锚掉头时，掉头的方向应向：（）

A.凸岸一侧

B.凹岸一侧

C.只能向右

D.只能向左

有机官能团定量分析中常用的化学分析方法中不包括（）。

A.酸碱滴定法

B.氧化还原滴定法

C.重量分析法

D.气体测量法

劳动号子一般在（）部分比较简单，重复较多。

A、独唱

B、轮唱

C、领唱

D、和唱

业务的接纳失败原因上报的基本原则是什么？（）

A.首次分配的信道类型的接纳失败原因

B.DCH信道的接纳失败原因

C.HSDPA信道的接纳失败原因

D.首次分配的非FACH信道的接纳失败原因