问题 问答题 简答题

血液系统已收到外源化学物质损害的原因。

答案

参考答案:

①血液和造血器官中各种成分与外源物化学物或其代谢产物接触机会较多。

②血液系统成分和功能的复杂性,使血液系统很容易受到外源化学物影响。

③外周血中各种细胞均由骨髓中造血干细胞增殖分化而来,高度增殖从而处于不同分化阶段的血细胞对外源化学物易感性较高。

阅读理解

Do you know Open Farm Sunday? It is a new day in Britain. It is the fourth mayional open day for the farming industry .Now it is setting more and more popular among people, especially among young people.

It is said that about 435 farms opened their gates to the public. The farmers invited people to their farms. Many people help the farmers work on the farms. They can do many things over there,such as water the crops and gather the crops. People could find pleasure of farming.

Open Farm Sunday is a good chance to enjoy the life of countryside,especially for people living in the cities.If you come to the farm,you will fall in love with the country life.Here you can listen to the birds,enjoy the beautiful view of countryside breathe the fresh air and watch the crops grow.You can also work with the farmers and taste the produce,such as tomatoes and cucumbers.

One farmer said,“Welcome children to our farms. We will show you where your food comes from.”

小题1:How many farms opened their gates to the public according to the passage?

A.About four hundred and five.

B.About four hundred and thirty-five.

C.About four hundred and fifty-five.

D.About four hundred and forty-two.小题2:What can visitors do on the farms according to the passage?

A.They can visitors the beautiful view of countryside.

B.They can watch the crops grow.

C.They can work with the farmers and taste the produce.

D.All of the above.小题3:What does the underlined word “view” mean in Chinese?

A.景色

B.小路

C.观点

D.乐趣小题4:Which of the following is TRUE according to the passage?

A.Open Farm Sunday is a new day in the USA.

B.It is the first ational open day for farming industry.

C.The people living in the countryside invited farmers to join them.

D.Open Farm Sunday is a good chance to enjoy the life of countryside.

小题5:The farmer said they would show us children             .

A.how to work on the farm

B.where we could grow crops

C.where our food came from

D.the pleasure of faring

单项选择题