由于气管或支气管狭窄或部分阻塞，气流吸入或呼出时发生湍流而产生的音响为（） A.捻发

阅读理解。

     There was a pilot and four people traveling in a small plane. Suddenly there was something wrong with

 the machine and the smoke was coming up.

     "I must go and repair the machine," the pilot said and jumped out with one of the parachutes.

     A fat woman stood up. "I'm a doctor," she said, "I have to live to save the patients' lives." With that

 word she jumped out with another parachute.

     A thin businessman said, "I'm a very clever man! I can make good plans for our country; I can make a

 lot of money; I can..." Without finishing his words, he quickly picked up a pack and jumped out.

     Two men were left behind an old professor and a young mountain climber. Seeing the plane was going

  down fast, the professor said, "Young man, I'm old but you are still young. Please take the last

 parachute." The young mountain climber smiled, "Don't worry, sir. Just now the clever man jumped out

 with my backpack!"

1. There were  _____ people in the plane including the pilot.

    A. five

    B. one

    C. four

    D. six

2. Who thought he was a clever man?

    A. The pilot.

    B. The young mountain climber.

    C. The businessman.

    D. The professor.

3. The businessman jumped out with _____ .

    A. a parachute

    B. the climber's pack

    C. his own parachute

    D. the doctor

4. From the story we know that _____ might lose his life.

    A. the businessman

    B. the professor

    C. the mountain climber

    D. the doctor

5. What is the best title for this story?

    A. A Small Plane

    B. An Accident

    C. Clever or Stupid

    D. Travel by Air

图上距离是4.5厘米，实际距离是1.5毫米，比例尺是（　　）

A．1：30

B．1：300

C．30：1

D．3：1

近年来，各地政府为促进“以创业带动就业”，从工商登记、资金筹措、信息咨询、技能培训、经营用地方面对农民工返乡创业予以大力支持。政府的做法履行了 [ ]

①实施经济调节的职能

②健全社会保障体系的职能

③提供公共服务的职能

④协调人民利益关系的职能

A．①②③

B．①③④

C．①②④

D．②③④

第一种工作票应在工作前一日送达值班负责人。临时工作可在工作开始以前交给值班负责人。第二、第三种工作票应在进行工作的（），预先交给值班负责人。

为什么说在所有焊接接头中，对接接头是一种最好的形式？