问题 选择题

许多家庭的门上都装有防盗门镜(俗称“猫眼”).从室内透过防盗门镜向外看,可以看到来客的正立、缩小的像.由此可以断定,此时防盗门镜的作用相当于一个(  )

A.凸透镜

B.凹透镜

C.三棱镜

D.玻璃砖

答案

门镜是由两块透镜组合而成.当我们从门内向外看时,物镜是凹透镜,目镜是凸透镜.最后看到来客的正立、缩小的像.所以防盗门镜的作用相当于一个凹透镜.凹透镜对光线有发散作用.

故选B.

阅读理解

I go to Australia for a meeting with my workmate, Chris. We decide(决定) to drive across the country after the meeting. The drive will take four days and most of it was across the desert(沙漠).

The first day is a lot of fun because we are happy to hear each other's jokes(玩笑). But on the third day, we begin to get bored. We are quite quiet for some hours when(这时) Chris sees some kangaroos(袋鼠).We are both excited and decide to take a closer(近一点的) look. Chris drives very quickly to catch up with(赶上)them. We got closer and closer. Suddenly(突然), we hear a loud BANG!

Chris stops the car and we get out. Beside the car is a large kangaroo(袋鼠) lying on the ground. Chris goes over to it and puts his cap on its head. He takes off his sunglasses and puts them on the kangaroo and does the same with his jacket. Then he puts his arm around the kangaroo and tells me to take a photo of them together. I take out my camera. When I am focusing(调整焦距)the camera, I sees the kangaroo move(移动). It suddenly wakes up, and runs away before we can do anything.

I start laughing(大笑) but Chris looks worried. He says his wallet is in the jacket. I start laughing even louder(更大). I stop laughing when he says that our car keys are also in the jacket.

小题1:Why does the writer go to Australia?

A.For a meeting.

B.For a trip.

C.For a holiday.

D.To see his friend.小题2:How long will the drive take according to their plan?

A.One day.

B.Four days.

C.Half a month.

D.Two months.小题3:What does the underlined word "bored" mean in Chinese?

A.无聊的

B.口渴的

C.饥饿的

D.困倦的小题4:Why do they hear a loud BANG?

A.Because there is something wrong with their car.

B.Because someone else is hunting(捕猎) kangaroos.

C.Because something falls off (从---掉下) their car.

D.Because their car knocks down(撞倒) a kangaroo.小题5:What can we know from the passage?

A.The writer takes a photo of Chris and the kangaroo.

B.The kangaroo runs away together with Chris’s wallet and their car keys in his jacket.

C.They decide to walk across the desert.

D.The writer is still(仍然)very happy at the end of the story.

单项选择题