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

 

Story 1

  In America in 1940，the twin boys went to live with two different families almost as soon as they were born．The two brothers never saw each other again until1979，when they met by chance at a party．When they started talking to each other，they discovered some amazing similarities(相似处)．First，they found out that they both enjoyed making things out of wood．Later on，they discovered that they had both married women called Linda，and that they both had one son whose first and middle names were James and Alan．Besides，both brothers had called their dogs by the same name-Toy．As if that wasn’t enough，they also found out that they both took their family holiday at the same place every year．

Story 2

    In 1996，a Filipino woman called Mrs. Jimena told other people that her three children could breathe underwater like fish．Mrs. Jimena said that her children had three small holes on the sides of their necks below each ear，and that these were like the gills(鱼鳃)on fish．Mrs. Jimena said that she didn’t know how to swim and that her children were just starting to learn. Her family lives in a mountain village far from the sea． According to Mrs. Jimena，the holes in her children’s necks become larger when they are underwater, allowing them to stay underwater for up to six minutes．

Story 3

    On 11th October，1994，a 10-year-old English girl called Vicky Willmore told her mother that she had a headache．Soon afterwards，Vicky began writing in mirror image(镜像)．She wrote letters and numbers either upsidedown or back-to-front．Although she could read what she wrote，no one else could．She was examined by different doctors，but none of them could find out what was wrong with her．Vicky became very upset，and soon stopped reading and writing altogether．Instead she started watching TV all the time．On 27th ，September 1995，Vicky was watching her favourite football team，Manchester United，play on television．When the team scored a goal，she became so excited that she jumped out of her seat and fell backwards，hitting her head on a coffee table．The next day，Vicky could read and write properly again．

1．The twin brothers didn’t meet each other until _________．

  A．1940            B．1979             C．1994               D．1996

2．The twin brothers_______．

  A．grew up in two different families

  B．didn’t have any similarities at all

  C．had two sons named James and Alan

  D．didn’t like making things out of wood

3．Mrs Jimena’s children could stay underwater for up to 6 minutes because ________．

  A．their mother was the best swimmer

  B．their village was close to the sea

  C．they had holes like gills below ears

  D．they bad gills like fish in their necks

4．The 10-year-old English girl changed her proper writing habit _______．

  A．soon after she had a headache one clay

  B．while she was watching a football match

  C．when she hit her head on a coffee table

  D．as soon as she stopped reading and writing

5．From the third story we know that ___________．

  A．Vicky wrote backwards for nearly three years

  B．doctors didn’t know what was wrong with Vicky

  C．hitting one’s head can make him write backwards

  D．watching football on television can cause trouble

6．This passage consists of three __________stories．

  A．traditional    B．historical         C．frightening             D．amazing