问题 综合

读太阳系模式示意图,回答问题。

(1)写出天体的名称或代号,并在相应的轨道上用箭头标出地球和I天体的公转方向。

    B________;E________;天王星________    

(2)太阳辐射的能量来源于太阳内部的________________。

(3)太阳系质量最大的天体是________,比太阳系高一级的天体系统是________。

(4)人类在不断尝试到宇宙空间寻找地外生命。简要说明可能存在地外智慧生命的天体需要具备的内、

    外部条件。

    _________________________________________________________________________________________

    _________________________________________________________________________________________

答案

(1)金星;木星;G;地球为逆时针;I星为顺时针

(2)核聚变反应

(3)太阳;银河系

(4)外部条件:①稳定的光照条件,②安全的宇宙环境。

    内部条件:①适宜的温度,②适宜生命呼吸的大气,③液态水的存在。

选择题
阅读理解

阅读理解。

      As a boy, Sanders was much influenced(影响) 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 English countryside, working under

an old doctor who hated the sight of blood. This gave the younger man plenty of opportunity(机会)

to go on working as a life-saver.

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

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

3. His experience in the Army proved that ___.

A. he was good at medical operations on the wounded

B. he succeeded in teaching people how to save their lives themselves

C. a doctor was the happiest man

D. his wish of being a life-saver could hardly come true

4. 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

5. 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