危险化学品泄漏物处置方法有（）。A、围堤堵截 B、稀释与覆盖 C、收集 D、废弃

冬季出生健康儿，现刚满2周，需给予维生素D预防佝偻病，其预防量每日应该是（）

A.400IU

B.1000IU

C.1500IU

D.2000IU

E.2500IU

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.

由唾液腺分泌的抗体是（）

A．IgA

B．sIgA

C．IgG

D．IgM

E．IgE

以下哪种方式不能作为建设工程开工日期确定的依据（）。

A.合同约定的开工日

B.经业主确定的开工报告中开工日期

C.业主下发的开工令

D.施工许可证中的开工日期

人眼球玻璃体淀粉样变性是一种罕见的眼病，主要症状是眼前黑影飘动并伴有视力缓慢下降，一般在40岁以上发病，常有家族史。在某个连续传递三代的玻璃体淀粉样变性的家族中（遗传系谱图如图1所示），第Ⅰ代发病情况不详，第2～4代共有7人发病，男女发病机会均等。请分析回答下列问题：

依据遗传系谱图推断，玻璃体淀粉样变性最可能的遗传方式为（）