问题 选择题

光的世界变幻莫测、奥妙无穷.下列关于光现象的说法中,正确的是(  )

A.不同颜色的光在真空中传播的速度不同

B.雨后彩虹是由于光发生反射形成的

C.海市蜃楼是由于光发生折射形成的

D.日食和月食现象都是光沿直线传播造成的

答案

CD。

A中不同颜色的光在真空中传播的速度是相同的,故A是不正确的;B中雨后彩虹是由于光发生折射形成的,故B也是不对的;C中海市蜃楼是由于光发生折射形成的是正确的;D中日食和月食现象都是光沿直线传播造成的,也是正确的。

单项选择题
阅读理解

All of the people have ambitions. An ambition is something we want to do, want to have, or want to be. A student’s ambition, for example, might be to pass his or her exams. An athlete’s ambition could be to win an important competition. A businessman’s ambition is usually to make a lot of money.

Not all ambitions are about success at work, however. Some people just want to be good people, have a happy family or help others.

Ben’s ambition is to be a sports writer. He writes the sports reports for his class newspaper. He likes most sports, but swimming and football are his favorites.

Trudy’s ambition is to be a concert pianist. She is very serious about it and practices every day with her best friend Lily. It is very important to her.

Harry’s ambition changes every day! One day he wants to be an astronaut. The next day he wants to be a pop singer. Then he wants to drive a racing car. His mother would be happy if his ambition was to get up in time for school every day!

What is your ambition?

小题1:The Chinese meaning of the underlined word “ambition” is “_______”.

A.信心

B.希望

C.理想

D.幻想小题2:What does a businessman want?

A.To pass the exams.

B.To win a competition.

C.To make a lot of money.

D.To get a good job.小题3:What does Ben want to be?

A.A newspaper reporter.

B.A famous swimmer.

C.A great football player.

D.A sports writer.小题4:Why does Trudy practice the piano every day?

A.Because she wants to be a concert pianist.

B.Because she wants to help Lily.

C.Because she wants to be a pop singer.

D.Because her mom tells her to.