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

 0  1595  1603  1609  1613  1619  1621  1625  1631  1633  1639  1645  1649  1651  1655  1661  1663  1669  1673  1675  1679  1681  1685  1687  1689  1690  1691  1693  1694  1695  1697  1699  1703  1705  1709  1711  1715  1721  1723  1729  1733  1735  1739  1745  1751  1753  1759  1763  1765  1771  1775  1781  1789  97155 

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网