下列句子朗读停顿不正确的一项是[ ] A、中/峨冠而多髯者/为/东坡。 B、复/

简述我国选举制度的基本原则。

为考核口服痢疾弧菌疫苗预防细菌性痢疾的效果，将1000名研究对象随机分成疫苗组和对照组，两组分别500人。以血清抗体的阳转和细菌性痢疾发病率的下降为结局变量指标，随访观察2年时间。研究结果表明，疫苗组的痢疾杆菌抗体阳转者450人，对照组的抗体阳转者50人；疫苗组发生细菌性痢疾病人15人，对照组发生细菌性痢疾病人60人。

该研究中次要结局变量是（）

A.细菌性痢疾发病率

B.抗体阳转率

C.服苗率

D.随访率

E.细菌性痢疾发病率和抗体阳转率

阅读理解。

     Mr. Briggs got a job with an insurance company (保险公司) after he left school and went around visiting

people in their homes to sell them life insurance. One day, after he had been working for the company for about a year, the insurance manager sent for him and said,"Mr. Briggs, I have been looking at your record as a

salesman with our company, and there is one thing that surprises me about it. Why have you been selling

insurance only to people over 95 years old, and why have you been giving them such generous(宽厚的)

conditions? You'll ruin our company if you go on like that."

      "Oh, no, sir," answered Mr. Briggs at once,"Before I started work, I looked at the figures (数字) for deaths

in this country during the past ten years, and I can tell you that few people die at the age of 95."

1. Before he worked in an insurance company, what was Mr. Briggs?

A.He was a manager.

B. He was an official.

C. He was a student.

D. He was a businessman.

2. The underlined word "ruin" in the first paragraph means ______.

A. lose

B. break

C. leave

D. destroy

3. As a salesman with the company, Mr. Brigs ________.

A. visited people to ask them to work with him

B. called on people to make them join the company

C. saw old people in order to help them

D. visited many people so as to offer insurance

4. What was it that surprised the manager?

A. Mr. Briggs sold life insurance only to 95 people.

B. Mr. Briggs sold insurance only to people of more than 95.

C. Mr. Briggs had ruined the insurance company.

D. Mr. Briggs gave people generous conditions.

5. Which of the following is true according to the passage?

A. The number of the very old people who died every year is small.

B. Mr. Briggs began to look at the figures after he started work.

C. A great number of very old people die every year.

D. Mr. Briggs had studied the figures for deaths for several years.

省资金中心的业务共分（）、日终处理类。

A.往来账业务类

B.信息管理类

C.信息查询类

D.凭证报表类

制氢室和储氢瓶房间内空气的含氢量不得大于（）。制氢室应配有测氢仪并经常进行测量，取样点应在聚氢区。