往复式泵完全不排液的原因有哪些？如何消除？

调查设计的好坏直接关系到调查方案的科学性、可行性和调查工作的成本或费用，但与调查结果的可靠性并无直接的关系。（）

众数

治疗中风失语，取（）。

A、督脉和十二井穴为主

B、任脉经穴为主

C、对侧运动区为主

D、语言区

E、手足阳明经穴为主

Bored by the Chinese courses he was majoring in, Zuo Cheng, 18, couldn't imagine having to drag himself into class day after day, week after week, for four years. The Beijing Language and Culture University student decided that enough was enough. After rounds of examinations and interviews, he managed to transfer (转移) to the Department of International Accounting.

"It may seem like I've wasted a year and have to start college all over again, but now that I've settled on a field, I'll be able to concentrate." Zuo said. Zuo is not alone.

At the China Three Gorges University in Yichang in Hubei province 53 out of 59 students in the Physics Department took transfer exams last term. Unfortunately only 22 of them got a place on another major.

Jiang Xin, 20, who was able to switch to electrical engineering and automation from physics, said that physics graduates had few other choices besides going into teaching. He added that a career in education just didn't suit him.

"I should have better job prospects (前景) and the chance to earn more money once I graduate," Jiang said. Many first year college students find their majors uninteresting.

However, Shao Yanfang, who works at the admissions office of a university, advised students to consider both short-term and long-term goals. "After graduation do you want to find yourself in a job very specifically related to your college major? Or, would you like to possess the knowledge and skills that will enable you to work in many areas? These are the questions students need to consider. Above all, your choice of major should be based on your own interests, abilities and personality," Shao said.

1. After Zuo Cheng managed to transfer the collage major, he felt________.

A. sad          B. happy               C. nervous           D. pitiful

2. Which of the following statements is true?

A. A lot of students are not accustomed to the life on campus.

B. Students who attend university want to earn more money.

C. Students can change their major based on their interests.

D. Students who are weak in their study can change their major.

3. In the passage, Paragraph 3 functions as ________.

A. an example        B. an introduction   C. a conclusion        D. an explanation

4. According to Shao Yanfang, students are supposed to think about ________ when changing majors.

A. present knowledge and skills              B. short-term and long-term goals

C. future earnings and jobs                  D. relationship between friends

5. The text is written mainly for those ________.

A. Company managers                     B. Job hunters

C. Collage directors                       D. College students

什么叫现在车统计？