问题 选择题

关于凸透镜成像情况,下列说法正确的是(  )

A.物体位于焦点以内时,成正立、放大的实像

B.物体位于焦点以内时,成倒立、放大的虚像

C.物体位于焦距与2倍焦距之间时,成倒立、放大的实像

D.物体位于2倍焦距之外时,成倒立、放大的实像

答案

A、物体位于焦点以内时,成正立、放大的虚像,故A错误;

B、物体位于焦点以内时,成正立、放大的虚像,故B错误;

C、物体位于焦距与2倍焦距之间时,成倒立、放大的实像,正确;

D、物体位于2倍焦距以外时,成倒立、缩小的实像,故D错误.

故选C.

阅读理解

 Jeans have become one piece of clothing worn by the most people in the world. Everybody wears them, from the farmer to the lawyer and from models to housewives. But why have jeans become so popular?You’ll get many answers. For some people they look cool, for others jeans are just comfortable. 

Jeans were first stronger trousers made for farm workers in the states of the American west. In the eastern part of the US jeans were hardly worn at all. They were connected with farm people and the workers. So the rich wouldn’t like to wear them. 

It was James Dean and Marlon Brando that made them popular in movies and everyone started to wear them. They were a symbol of the rebellion of young people during the 1950s and 1960s. So these new trousers were not allowed in American schools and sometimes in theatres and cinemas. As time went on,jeans became more acceptable. American people in Europe and Japan often wore them when they were not on duty to show that they were Americans. The trousers showed the world a happier way of life, something that people needed, especially after what they had gone through in World War II. 

Jeans had other advantages as well. They didn’t need to be washed as often as other trousers and women didn’t need to iron them. This became more important as more and more women started working and had less time for housework. 

Today jeans are an important part of our lives. They are always washed a few times before they are sold to give them a faded look. 

小题1:Jeans first appeared ___________.

A.in eastern America

B.in western America

C.in Middle America

D.all over America小题2:From the passage, we can know that James Dean and Marlon Brando were              .

A.film stars

B.Jeans makers

C.young students

D.farmers or workers小题3:What is the possible meaning of the underlined “rebellion” in this passage?

A.奢侈

B.活力

C.清纯

D.反叛小题4:Which of the following was a possible advantage of jeans to women?

A.They could easily be bought anywhere in the world.

B.They didn’t need to be washed often or ironed.

C.They had many different styles and colors.

D.They were comfortable and easy to wash.小题5:What is the best title of the passage?

A.Jeans --- Symbol of Wealth

B.Jeans --- Working Women’s Best Choice

C.Jeans --- Popular Piece of Clothing in Our Daily Life

D.Jeans --- Part of the Lives of Farm People and Workers

单项选择题