问题 单项选择题

在样本率与总体率比较的假设检验中,率的抽样误差大小表示()

A.由于混杂因素而引起的样本率与总体率之间的差别

B.由于重复测量而引起的样本率与总体率之间的差别

C.由于抽样而引起的样本率与总体率之间的差别

D.由于来自不同总体而产生的差别

E.由于研究者经验不足而引起的差别

答案

参考答案:C

阅读理解

阅读理解。

     Steve Ballmer is always exciting, as he was this time in front of over 2,000 students from Qinghua

University and Beijing University.

     Ballmer, president (总裁) of Microsoft Corp., received a warm welcome at Qinghua University when he

gave a talk on the next generation (一代) of the Internet on September 19th. He came to China last week for

a two-day visit, during which he slept only four hours and had many meetings with government officials (政府官员) and men of business. After all those business matters, he came to Qinghua and was asked thousands

of questions from the excited students.

     Ballmer, who joined Microsoft in 1980, is the first business manager hired (聘用) by Bill Gates, a

schoolmate of Ballmer at Harvard. Gates first dropped out of school to start Microsoft and Ballmer was still

studying, but he also gave up his studies and joined Bill Gates' five-year-old Microsoft in 1980.

     In his talk to the students, Ballmer described what the Internet will bring to their life. He said there are

several hundred Qinghua graduates now working or being trained at Microsoft both in China and in the US.

He also warned the students not to drop out of school and follow the examples of Bill Gates and himself.

1. Ballmer gave a talk on ___________ at Qinghua.

A. the future of the Internet

B. how to use the software made in his company

C. what computers will bring to universities

D. his own experience from Harvard to Microsoft

2. It seemed that Ballmer came to China mainly ___________.

A. to meet some government officials

B. to give a talk at Qinghua University

C. to manage business matters

D. to visit places of interest

3. He encouraged Chinese students ___________.

A. to work for Microsoft in China or in America

B. to follow the examples of Bill Gates and himself

C. to work on software

D. to go on and finish their college education

4. From the passage we know Steve Ballmer ___________.

A. graduated from Harvard University

B. asked the students a lot of questions

C. is president of Microsoft Corp

D. started Microsoft Corp. in 1980

选择题