下列词句中，描写生物遗传的是（ ） A．螳螂捕蝉，黄雀在后 B．星星之火，可以燎

网络中所使用的互联设备HUB称为（ ）。

A．集线器

B．路由器

C．服务器

D．网关

As a boy, Sanders was much influenced by books about the sea, but by the age of fifteen he had decided to become a doctor rather than a sailor. His father was a doctor. So he was often with the doctors and got along very well with them. When he was fourteen, he was already hanging around the hospital where he was supposed to be helping to clean the medicine bottles, but was actually trying to listen to the doctors’ conversations with patients in the next room.

During the war Sanders served in the army as a surgeon(外科医生). “That was the happiest time of my life. I was dealing with real sufferers and on the whole making a success of my job.” In Rhodes he taught the country people simple facts about medicine. He saw himself as a life-saver. He had proved his skill to himself and had a firm belief that he could serve those who lived simply, and were dependent upon him. Thus, while in a position to tell them what to do he could feel he was serving them.

After the war, he married and set up a practice deep in the countryside, working under an old doctor who hated the sight of blood. This gave the younger man plenty of opportunities (机会) to go on working as a life-saver.

小题1:When he was a small boy, books about the sea had made Sanders want to be ___.

A．a surgeon

B．an army man

C．a sailor

D．a life-saver小题2:At the age of 14, Sanders ___.

A．worked as a doctor by cleaning the medicine bottles

B．met some doctors who were very friendly to him

C．was interested in talking with patients

D．remained together with the doctors小题3:Having proved his skill to himself, Sanders ___.

A．wanted to live a simple life like a countryman

B．came to realize that he was really working for his countrymen

C．taught himself life-saving

D．was highly respected by the old doctor小题4:When the war was over, he ___.

A．learned from an old doctor because he was popular

B．started to hate the sight of blood while working

C．served the countrymen under an old doctor who needed someone to help him

D．had few chances to be a “life-saver” because he was younger

新装饰的居室中，常常有一种可使人眼红、流泪和咳嗽的刺激性气体，这很可能是

A．S02

B．CO

C．C02

D．甲醛

E．氮氧化物

大脑基底核包括（）

A.尾状核、壳核和苍白球

B.尾状核、豆状核、内囊

C.内囊、壳核和苍白球

D.内囊、豆状核、苍白球

E.豆状核、尾状核和壳核

期货的投机交易是为了转移价格风险，获取稳定的收益。( )