精英家教網 > 高中英語 > 題目詳情

  Space is dangerous place, not only because of meteors(流星)but also because of rays from the sun and other stars.The atmosphere again acts as our protective blanket on earth.Light gets through, and this is essential for plants to make the food which we eat.Heat, too, makes our environment endurable.Various kinds of rays come through the air from outer space, but enormous quantities of radiation(輻射)from the sun are screened off.As soon as men leave the atmosphere they are exposed to this radiation but their spacesuits or the walls of their spacecraft, if they are inside, do prevent a lot of radiation damage.

  Radiation is the greatest known danger to explorers in space.The unit of radiation is called “rem”.Scientists have recon to think that a man can put up with far more radiation than 0.1 rem without being damaged; the figure of 60 rems has been agreed on.The trouble is that it is extremely difficult to be sure about radiation damagea person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will not be discovered until the birth of deformed(畸形的)children or even grandchildren.

  Missions of the Apollo flights have had to cross belts of high amount of rems.So far, no dangerous amounts of radiation have been reported, but the Apollo missions have been quite short.We simply do not know yet how men are going to get on when they spend weeks and months outside the protection of the atmosphere, working in a space laboratory.Drugs might help to decrease the damage done by radiation, but no really effective ones have been found so far.

(1)

According to the first paragraph, the atmosphere is essential to man because ________.

[  ]

A.

it protects him against the harmful rays from space

B.

it provides sufficient light for plant growth

C.

it supplies the heat necessary for human survival

D.

it screens off the falling meteors

(2)

The harm radiation has done to the Apollo crew members ________.

[  ]

A.

is insignificant

B.

seems overestimated

C.

is enormous

D.

remains unknown

(3)

It can be inferred from the passage that ________.

[  ]

A.

the Apollo mission was very successful

B.

protection against space radiation is no easy job

C.

astronauts will have deformed children or grandchildren

D.

radiation is not a threat to well protected space explorers

(4)

The best title for this passage would be ________.

[  ]

A.

The Atmosphere and Our Environment

B.

Research on Radiation

C.

Effects of Space Radiation

D.

Importance of Protection Against Radiation

答案:1.A;2.D;3.B;4.C;
練習冊系列答案
相關習題

科目:高中英語 來源: 題型:054

閱讀下面短文, 掌握其大意, 然后1 ̄25各題所給的四個選項中, 選出一個最佳 答案。

(A)

      In 1962, A Russian woman told her doctor that she could see with   her fingers. 1 the doctor did not believe it 2 he saw with his own   eyes. The doctor 3 her eyes with a large handkerchief and then put   colored papers 4 newspapers under her hands. She was able to 5 one   color from 6 and read the newspaper by 7 and feeling them. The doctor   examined her many times and was 8 with the examination, so he sent 9   to Moscow, in which she was further examined by 10. Her unusual powers,   in the end, were 11.

       The early 12 into these unusual powers has shown that 13 man   trusts only his eyes he will 14 be able to see outside the limits of   time and into the 15.

                                                                                                                                                                                                                                                                             
1. A. Easily  B. Certainly  C. So  D. Sometimes    [  ]
2. A. after   B. when     C. until  D. since     [ 。
3. A. opened  B. hid      C. closed   D. covered   [ 。
4. A. but     B. and      C. or     D. also    [ 。
5. A. see     B. guess    C. tell   D. think     [  ]
6. A. those   B. that     C. other  D. another   [ 。
7. A. seeing  B. singing    C. touching D. checking  [ 。
8. A. satisfied B. strict     C. busy   D. very careful    [ 。
9. A. him     B. them     C. her    D. it      [ 。
10. A. nursesB. scientists C. blind peopleD. good teachers[ 。
11. A. examined  B. believed  C. known     D. true   [  ]
12. A. lesson    B. examination  C. newspapers  D. research  [ 。
13. A. if   B. whether  C. because     D. after    [ 。
14. A. hardly   B. not  C. certainly   D. easily     [ 。
15. A. space  B. world   C. future   D. earth    [ 。

(B)

(W=woman;P=policeman)

W: Excuse me. I want to buy an English dictionary for my daughter.   could you tell me 16 to get it?

P: I think you can get it from the book shop in the center   of the 17. There are all kinds of dictionaries there.

W: Thanks. But I don't know the way to the book shop. This is my 18   time to come here.

P: Oh, welcome to our city, madam. The book shop is a bit far from   here. I think it's 19 to go there by bus. The No. 4 bus will take you   there. The bus stop is just on the other side of the street.

W: But I want to 20 the city while I'm walking.

P: OK! Go up the road and turn right at the second 21, walk on until   you reach a big bridge. Go across it and take the first turning on   the left. Walk 22 the road with some flowers and trees on 23 sides. At the end of the road you'll find the book shop on your right, 24 the   museum and the Bank of China. You can't miss it.

W: Oh, it's really a long 25, But it doesn't matter. I like walking.   It's very kind of you, young man. Thanks a lot.

P: You're welcome.

                                                                                                                                                                                   
16. A. what  B. where  C. when  D. which       [ 。
17. A. shop  B. village  C. city  D. village       [ 。
18. A. first   B. second   C. third   D. fourth      [ 。
19. A. best  B. better   C. well  D. good        [ 。
20. A. look  B. visit  C. watch   D. travel      [  ]
21. A. turning  B. crossing   C. lights  D. cross    [ 。
22. A. on    B. slowly  C. along   D. alone      [ 。
23. A. all   B. both    C. each    D. every      [ 。
24. A. between B. among   C. inside  D. beside     [  ]
25. A. road  B. street  C. way  D. path        [ 。

查看答案和解析>>

科目:高中英語 來源: 題型:054

完形填空

閱讀下面短文,從短文后所給各題的四個選項(A、BCD)中選出能填入空白處的最佳選項。

What actually happens when we read? Some people think that we read one word   1   ,

understand it and then go on to the next. Other people think that our eyes smoothly   2   over each line from left to right, then back to the beginning of the    3    line, and so on. In fact, the physical action of reading usually doesn’t work in    4    of those ways.

   5    you do this experiment with a friend. Get hold of a book with a large page

  6   and with lines that go right   7    the page.    8    your friend to    9    the book up and to read it with the top of the book just    10     his eyes level. This   11    that you can watch the movement of his eyes as he read the page.   12    you do this, you will see that your friend’s eyes do not make a continuous forward sweep.   13    they progress(前移) by little “jumps”, moving, then stopping, as they progress along the line.

   14    to be this starting and stopping movement    15    the eye can see only when it is not moving. Every time the eye    16     it sees a phrase or even a sentence, then jumps to the next part of the line, and so on.

There is another interesting fact about eye movement. You will notice that,    17    , the reader goes back and looks again at something he    18     before, in other words, he returns to an earlier part of the text probably because he    19    he is not understanding it properly. Then he comes back to    20     he stopped and continues reading.

1.A.at a time                       B.at one time

C.at time                         D.at times

2.A.turn                           B.fly

C.move                         D.flee

3.A.above                         B.next

C.same                              D.second

4.A.either                             B.neither

C.all                           D.both

5.A.Think                         B.Guess

C.Suppose                        D.Suggest

6.A.number                        B.quantity

C.space                          D.size

7.A.off                           B.across

C.up                           D.down

8.A.Have                           B.To have

C.Get                           D.To get

9.A.hold                            B.pick

C.put                            D.set

10.A.below                         B.in

C.beside                          D.on

11.A.shows                        B.means

C.expresses                       D.proves

12.A.Unless                        B.If

C.Because                       D.Although

13.A.Howe’ver                     B.Altogether

C.Therefore                         D.Instead

14.A.It has                         B.It is

C.There has                         D.There is

15.A.if                           B.unless

C.although                        D.because

16.A.jumps                         B.moves

C.pauses                         D.turns

17.A.from time to time                 B.at the same time

C.on time                         D.in no time

18.A.read                              B.has read

C.was reading                     D.had read

19.A.wonders                       B.knows

C.realizes                        D.fears

20.A.what                          B.which

C.that                           D.where

 

查看答案和解析>>

科目:高中英語 來源:英語教研室 題型:054

完形填空

閱讀下面短文,從短文后所給各題的四個選項(A、BC、D)中選出能填入空白處的最佳選項。

What actually happens when we read? Some people think that we read one word   1   ,

understand it and then go on to the next. Other people think that our eyes smoothly   2   over each line from left to right, then back to the beginning of the    3    line, and so on. In fact, the physical action of reading usually doesn’t work in    4    of those ways.

   5    you do this experiment with a friend. Get hold of a book with a large page

  6   and with lines that go right   7    the page.    8    your friend to    9    the book up and to read it with the top of the book just    10     his eyes level. This   11    that you can watch the movement of his eyes as he read the page.   12    you do this, you will see that your friend’s eyes do not make a continuous forward sweep.   13    they progress(前移) by little “jumps”, moving, then stopping, as they progress along the line.

   14    to be this starting and stopping movement    15    the eye can see only when it is not moving. Every time the eye    16     it sees a phrase or even a sentence, then jumps to the next part of the line, and so on.

There is another interesting fact about eye movement. You will notice that,    17    , the reader goes back and looks again at something he    18     before, in other words, he returns to an earlier part of the text probably because he    19    he is not understanding it properly. Then he comes back to    20     he stopped and continues reading.

1.A.at a time                       B.at one time

C.at time                         D.at times

2.A.turn                           B.fly

C.move                         D.flee

3.A.above                         B.next

C.same                              D.second

4.A.either                             B.neither

C.all                           D.both

5.A.Think                   ?;        B.Guess

C.Suppose                        D.Suggest

6.A.number                        B.quantity

C.space                          D.size

7.A.off                           B.across

C.up                           D.down

8.A.Have                           B.To have

C.Get                           D.To get

9.A.hold                            B.pick

C.put                            D.set

10.A.below                         B.in

C.beside                          D.on

11.A.shows                        B.means

C.expresses                       D.proves

12.A.Unless                        B.If

C.Because                       D.Although

13.A.Howe’ver                     B.Altogether

C.Therefore                         D.Instead

14.A.It has                         B.It is

C.There has                         D.There is

15.A.if                           B.unless

C.although                        D.because

16.A.jumps                         B.moves

C.pauses                         D.turns

17.A.from time to time                 B.at the same time

C.on time                         D.in no time

18.A.read                              B.has read

C.was reading                     D.had read

19.A.wonders                       B.knows

C.realizes                        D.fears

20.A.what                          B.which

C.that                           D.where

 

查看答案和解析>>

科目:高中英語 來源: 題型:054

There have been many great inventions, which have changed the way we live. The first great invention was    1     that is still very important today—the wheel(輪子). This made it easier to    2     heavy things and to travel long distances.

For hundreds of years after that there were few inventions that have as much   3   as the wheel. Then in the early 1800’s the world started to    4    . There was little unknown land in the world. People did not    5     to explore any more. They began to work so as to

    6    life better.

In the second half of the 19th century many great inventions were made.   7     them were the camera, the electric light and the radio. These all became a big   8     of our life today.

The first part of the 20th century saw more great    9    : the helicopter in 1909; movies with sound in 1926; the computer in 1928; and jet planes in 1930. This was also a time    10 

a new material was first made. Nylon came   11     in 1935. It changed the   12     of clothes people had been wearing.

The middle part of the 20th century brought new ways to help people get over   13    .

They worked very well. They made people healthier and let them live    14     lives. By the 1960’s most people could    15     to live at least 60.

By this time most people had a very good life. Of course new inventions    16     to be made. But man now had a desire to explore again. The world was   17    to man but the stars were not. Man began looking for ways to go into    18    . Russia made the first step. Then the United States took a step. Since then other countries,    19     China and Japan have made their steps into space.

In 1969 man took his biggest step away from the earth. Americans first walked on the moon. This is certainly just a   20     thought. New inventions will someday allow us to do things we have never dreamed of.

1. A. the one       B. that       C. one       D. it

2. A. carry           B. bring      C. find       D. put

3. A. time                         B. knowledge      

C. situation                        D. effect

4. A. appear                       B. mind      

C. change                        D. rise

5. A. have                        B. want      

C. decide                         D. like

6. A. work                         B. turn      

C.make                          D. think

7. A.In                           B. Among       

C. Between                         D. About

8. A. sort                         B. part      

C. step                          D. use

9. A. results                       B. jobs      

C. things                          D. inventions

10. A. when                       B. which      

C. if                            D. as

11. A. out                         B. in      

C. away                           D. about

12. A. rest                        B. course      

C. kind                          D. pattern

13. A. rules                        B. diseases

C. difficulties                          D. problems

14. A. more important                 B. longer

C. happier                        D. better

15. A. hope                        B. expect      

C. start                          D. ask

16. A. go on                       B. begin      

C. are able                         D. continue

17. A. useful                      B. popular      

C. common                        D. known

18. A. space                         B. sky      

C. air                             D. room

19. A. including                    B. except      

C. but                            D. like

20. A. moving                      B. interesting

C. beginning                       D. surprising

 

查看答案和解析>>

科目:高中英語 來源:英語教研室 題型:054

There have been many great inventions, which have changed the way we live. The first great invention was    1     that is still very important today—the wheel(輪子). This made it easier to    2     heavy things and to travel long distances.

For hundreds of years after that there were few inventions that have as much   3   as the wheel. Then in the early 1800’s the world started to    4    . There was little unknown land in the world. People did not    5     to explore any more. They began to work so as to

    6    life better.

In the second half of the 19th century many great inventions were made.   7     them were the camera, the electric light and the radio. These all became a big   8     of our life today.

The first part of the 20th century saw more great    9    : the helicopter in 1909; movies with sound in 1926; the computer in 1928; and jet planes in 1930. This was also a time    10 

a new material was first made. Nylon came   11     in 1935. It changed the   12     of clothes people had been wearing.

The middle part of the 20th century brought new ways to help people get over   13    .

They worked very well. They made people healthier and let them live    14     lives. By the 1960’s most people could    15     to live at least 60.

By this time most people had a very good life. Of course new inventions    16     to be made. But man now had a desire to explore again. The world was   17    to man but the stars were not. Man began looking for ways to go into    18    . Russia made the first step. Then the United States took a step. Since then other countries,    19     China and Japan have made their steps into space.

In 1969 man took his biggest step away from the earth. Americans first walked on the moon. This is certainly just a   20     thought. New inventions will someday allow us to do things we have never dreamed of.

1. A. the one       B. that       C. one       D. it

2. A. carry           B. bring      C. find       D. put

3. A. time                         B. knowledge      

C. situation                        D. effect

4. A. appear                       B. mind      

C. change                        D. rise

5. A. have                        B. want      

C. decide                         D. like

6. A. work                         B. turn        

C.make                          D. think

7. A.In                           B. Among       

C. Between                         D. About

8. A. sort                         B. part      

C. step                          D. use

9. A. results                       B. jobs      

C. things                          D. inventions

10. A. when                       B. which      

C. if                            D. as

11. A. out                         B. in      

C. away                           D. about

12. A. rest                        B. course      

C. kind                          D. pattern

13. A. rules                        B. diseases

C. difficulties                          D. problems

14. A. more important                 B. longer

C. happier                        D. better

15. A. hope                        B. expect      

C. start                          D. ask

16. A. go on                       B. begin      

C. are able                         D. continue

17. A. useful                      B. popular      

C. common                        D. known

18. A. space                         B. sky      

C. air                             D. room

19. A. including                    B. except      

C. but                            D. like

20. A. moving                      B. interesting

C. beginning                       D. surprising

 

查看答案和解析>>

同步練習冊答案