钢坯的断面形状有方形、矩形、圆形和（）。

       Steven Jobs, the designer of Apple Computer, was not quite successful in his early years. At that time, he was not among the best students at school, and from time to time he got into trouble with either his schoolmates or his teachers. But he was full of new ideas, which few people saw the value of. Things remained the same when he went up to college and he dropped out halfway (中途退学). 

       After he left college, Steven Jobs worked as a video game designer at Atari. He worked there for only several months and then he went to India. He hoped that the trip would give him some new ideas and a change in life for the better.

       Steven Jobs lived on a farm in California for a year after he returned from India. And then, in 1975, he began to make a new type of computer. Along with his friend Stephen Woziak, he designed the Apple Computer in his garage (车库). He chose the name “Apple” just because it reminded him of a happy summer he once spent in an apple tree garden.

      His Apple Computer was such a great success that Steven Jobs soon became famous all over the world.

1. Steven Jobs seemed ________ when he was young.

A..to be one of the best students at school    

B. not to be a good student at school

C. to be liked by all his teachers  

D. to leave the school

2. Why did Steven Jobs go to India?

A. Because he was interested in India.  

B. Because he was given a job as a designer there.

C. Because he hoped to get some new ideas from the trip.  

D. Because he wanted to study there.

3. Steven Jobs designed his new computer ________.

A. in India        

B. with his friend

C. in an apple tree garden    

D. by himself

4. Steven Jobs was famous for his ________ all over the world.

A. new ideas                

B. apple trees  

C. Apple Computer            

D. video games

5. From this passage we can learn that ________.

A. Steven Jobs got on well with his schoolmates  

B. Steven Jobs was full of new ideas, but only one of them was valuable.

C. Steven Jobs could only design video games

D. Steven Jobs liked trying new things and making his new ideas become true

被誉为“风车之国”的是哪个国家( )

A．荷兰

B．丹麦

C．英国

D．比利时

下列各组大洲中，大陆均被北回归线穿过的有

A．亚洲、欧洲、南美洲

B．亚洲、欧洲、北美洲

C．非洲、亚洲、北美洲

D．北美洲、非洲、大洋州

机车担当机务段所在站的相邻两个或更多区段的列车牵引任务，除需要进入折返段进行技术作业或因检修修程需要入机务段外，机车均在机务段所在站进行乘务员换班和整备作业，直到需要定期检修时才入本段的叫（）运转方式。

A、半肩回式

B、肩回式

C、循环式

D、环行

简述变形的概念。