As space science develops, man has learned more and more about space．Space is not only amazing but also dangerous．While working in space, spacemen are facing danger as well as Success．

Scientists have found out that radiation(辐射)is the greatest danger to spacemen in space．When space men are working in space, they are in danger of radiation from the sun and other stars, which is bad for their health．The damage(危害)done by radiation won’t be discovered until their children or even grandchildren are born．Some special medicine may work a little, but no really helpful medicine mas been．

Space junk(垃圾)is also thought a great danger to spacemen．It's reported that there are 9,000 man-made things flying in space．About 30％of these are satellites(卫星), 10％are spaceships, and the rest are space junk．An explosion(爆炸)in l996 made a cloud of 300,000 fragments, each at least 4ram in size, and even a small piece of these knocked against a spaceship window and did some damage．Scientists are watching and reporting any possible danger all the time．They are working on helpful ways to do with space junk．

Although space is really dangerous, it interests everyone on the earth．In the near future, it may become usual for people to spend a few days in a space hotel．We may even choose to leave the earth and live in space in a few years．So we should care for space and do something to help improve the space environment．

根据短文内容选择最佳答案。

1．         shows the man-made things in space in the correct way．

2．Space junk and radiation in space are dangerous to              ．

A．spacemen working in space

B．people only on the earth

C．all the people except children

3．The underlined word “fragments” means            ．

A．碎片                   B．泡沫                    C．烟雾

4．Which of the following about the passage (短文)is TRUE?

A．The passage tells us that radiation in space comes from the sun and other stars．

B．Every one of us can make a trip to space now．

C．Scientists have found out ways to solve any problem in space．

5．％e best title(标题)of the passage is                ．

A．Space Radiation     B．Space Danger       C．Space Junk

They are working ________ on the farm．Everyone ________ busy．

1. A.
   harder, is
2. B.
   hard, is
3. C.
   harder, are
4. D.
   hardest, are

As space science develops, man has learned more and more about space. Space is not only amazing but also dangerous. While working in space, spacemen are facing danger as well as success.

Scientists have found out that radiation(辐射) is the greatest danger to spacemen in space. When spacemen are working in space, they are. in danger of radiation from the sun and other stars, which is bad for their health. The damage(危害) done by radiation won't be discovered until their children or even grandchildren are born. Some special medicine may work a little, but no really helpful medicine has been.

Space junk(垃圾) is also thought a great danger to spacemen. It's reported that there are 9,000 man-made things flying in space. About 30% of these are satellites, 10% are spaceships, and the rest are space junk. An explosion(爆炸) in 1996 made a cloud of 300,000.fragments, each at least 4mm in size, and even a small piece of these knocked against a spaceship window and did some damage. Scientists are watching and reporting any possible danger all the time. They are working on helpful ways to do with space junk.

Although space is really dangerous, it interests everyone on the earth. In the near future, it may become usual for people to spend a few days in a space hotel. We may even choose to leave the earth and live m space in a few years. So we should care for space and do something to help improve the space environment.

51．_________shows the man-made things in Space in the correct way.

52. Space junk and radiation in space are dangerous to______.

A. spacemen working in space　　　　　 B. people only on the earth

C. all the people except children　　 D. All the spacemen

53. The underlined word “fragments” means “_______”.

A.碎片　　　 B.泡沫　　　 C.烟雾　　　 D.粉末

54. Which of the following about the passage is TRUE'?

A. The spaceships, are not dangerous in space.

B. Every one of us can make a trip to space now.

C. Scientists have found out ways to solve any problem in space.

D. The passage tells us that radiation in space comes from the sun and other stars.

55. The best title of the passage is______.

A. Space Radiation　 B. Space Danger C. Space Junk　 D. Space explosion

Soon computers and other machines will be able to remember you by looking at your eyes! The programme works because everyone’s eyes are different. So in the future you won’t have to remember a number when you want to use a machine or take money out of a bank. You’ll just have to look at the machine and it will be able to tell who you are.
The eye-recognition(眼睛识别) programme is already being tested in shops and banks in the USA, Britain, Spain, Italy and Turkey. Soon, this technology will take the place of all other ways of finding out who people are.
However, scientists are working on other systems. Machines will soon be able to know you from the shape of your face or hand or even your smell! We already have machines that can tell who you are from your voice or the mark made by your finger.
Eye-recognition is better than other kinds because your eyes don’t change as you get older, or get dirty like hands or fingers. And even twins have different eyes, so the programme can be up to 94% correct, depending on(依靠) how good the technology is. Some programmes may only be right 51% of the time. In Britain, it was found that 91% of people who had tried it said that they liked the idea of eye-recognition.
In the future your computure will be looking at you in the eye. So smile!
【小题1】 How does the eye-recognition programme work?