Question

　　Bats are the only flying mammals(哺乳动物) in the world. They can't see very well. It was long believed that all bats are blind. “Blind as a bat” is often heard.

　　Yet they have no trouble flying on the darkest nights and finding their way around very well. How can bats fly and see at night? They fly by radar(雷达).

　　The bat's radar system(雷达系统) works the same way as the one that ships and planes use. As a bat flies through the air, he makes a sound that is too high for our ears to hear. When the sounds hit things, they come back. The bat's ears receive the messages. In this way they are able to tell the bats where the things are.

　　Bats go out to look for food at night. Some people have the bats as bad animals. In fact, they are useful animals.

1．This article (文章) tells us about ________ .

[　　]

A．the bat like a bird with things

B．the radar

C．a blind man

D．the bat used for playing table tennis

2．The bat is ________ .

[　　]

A．an animal

B．a bird

C．fish

D．a beast

3．“As blind as a bat” means a person who is ________ .

[　　]

A．blind in the left eye

B．able to see well

C．not able to see well

D．lame in the right foot

4．Bats have no trouble flying on the darkest nights because ________ .

[　　]

A．they have very poor sight(视力)

B．they have a kind of radar system to help them

C．they have to look for food

D．they can see things in the dark nights

5．Bats go out to look for food ________ .

[　　]

A．at noon

B．in the afternoon

C．during the day-time

D．after the sun sets and before the sun rises

Answer 1

答案：B;A;C;B;D