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Unit 14:Satellites

http://www.sina.com.cn 2003/09/26 00:12 新浪教育

Passage 1

　　阅读理解一

　　Manmade satellites have been sent up into space by many countries. These satellites go round the earth and help us to learn more about the earth, the weather and other things. Most countries use these satellites to send and receive messages. For example, with their help, China can send its TV and radio programmes to the other side of the world. Foreign countries can send their programmes to China. We can also use satellites to help to make telephone calls to foreign countries.

　　Our knowledge of the universe is growing all the time. Our knowledge grows and the universe becomes bigger, fuller or more complete. But thanks to space satellites, the world itself is becoming a much smaller space and people from different countries understand each other better.

　　注释

　　1. knowledge n.知识；学识

　　2. thanks to由于；多亏，因为

　　根据短文内容选择正确答案

　　( )1Many countriesman_____made satellites into space.

　　A.have been sent up

　　B. send up

　　C. have sent up

　　D. will send up

　　( )2With the help of satellites, the earth, the weather and other things can_____.

　　A. be learned very much

　　B. be learned a lot

　　C. learn about more

　　D. be learned more about

　　( )3Satellites _____ send and receive messages.

　　A. are used

　　B. have been used to

　　C. are used to

　　D. have been used

　　( )4Satellites can help us _____ our TV and radio programmes to_____.

　　A. to send, other people

　　B. send, foreign countries

　　C. to send, another country

　　D. send, a few countries

　　( )5Thanks to space satellites_____.

　　A. people from all over the world can understand each other better

　　B. people don't know each other when they are from different countries

　　C. the world is becoming smaller and smaller and people don't need to know each other

　　D. the world seems to become smaller and people from the same country understand much better

Passage 2

　　阅读理解二

　　Television signals cross a continent by relay towers, which pick up and amplify the straightline microwave beams. But there is no way to build towers on water, and a signal sent across the sea could not follow the curve of the earth. Its straightline beam would soar off into space.

　　Scientists have solved this problem by designing a new kind of tower, a tower in the skya satellite. An active satellite contains amplifier much like those in the overland microwave towers. When a microwave is beamed to it from a ground transmitter the satellite increases the strength of the singal and reflects it to a ground receiving station beyond the curve of the globe.

　　Technologists know enough today to place a satellite system in mediumrange altitudes, from about 5000 to 8000 miles in space. A system of about fifty satellites would provide many circuits, which would cover the present communication needs of the world. Telephone and telegraph messages would be carried at high speed. TV broadcasts would be shared internationally.

　　Plans have also been studied for highaltitude satellites as much as 22000 miles off in space, but there are still problems with these. Some way must be found to fix such satellites in a firm position so that they will always be "on station".

　　注释

　　1. amplify vt.扩大；放大；展开

　　2. beam n.射线，射束；波束；(扩音器的)最大有效范围v.播放，放射

　　3. curve n.弧线,曲线

　　4. soar vt.飞翔到，高飞到

　　5. transmitter n.发报机，发射机

　　6. altitude n.地球表面上的高度；海拔高度

　　7. circuit n.电路，回路，网路，线路

　　根据短文内容选择正确答案

　　( )1Overseas television presented problems because of difficulties in_____ .

　　A. building towers in the sky

　　B. building towers on water

　　C.shavingsmicrowaves follow the earth's curve

　　D. both B and C

　　( )2One advance possible by this system is given as_____ .

　　A. internationally shared television broadcasts

　　B. internationally shared weather forecasts

　　C. highspeed interchange on market affairs

　　D. rapid transmission of military information

　　( )3According to the passage, a problem facing the planners of a highaltitude system is _____

　　A. way of keeping its units in place

　　B. doubt about the size of units needed

　　C. short of information about microwave transmission

　　D. shortage of properly trained technicians

　　( )4All of the following statements are true according to the passage EXCEPT_____ .

　　A. overland television is carried by relay towers

　　B. overland television is now carried by space station

　　C. whether overland or overseas, television signal need to be amplified

　　( )5It is implied in the passage that _____.

　　A. a system of about fifty satellites would not cover man's present needs

　　B. microwaves travel in a straight line

　　C. travelling a great distance weakens a microwave

　　D. the problem of highaltitude can be solved in the near future

Passage 3

　　完形填空

　　During the past hundred years,the car,the radio,the cinema,and now television,have produced great___1__ in the amusements with which people pass their __2___ time.

　　A __3___ years ago,people were in the habit of making their own amusements.When asgroupsof people __4___ together,they talked,played cards,or other games,or went out riding,shooting,or walking together.Most people could sing a little,or play some musical instrument reasonably well;so at a party the guests amused each other. ___5__,conversation was an __6___ : amusing conversation could __7___ people happy for hours.

　　As for games such as football and cricket,people were also in the habit of playing them themselves.Most of them did not play very well,but they __8___ themselves and their friends.

　　Nowadays we are amused by professional singers or players.Why listen to your friends singing when you can __9___ the great singers of the world over the radio or on TV? Why play football with players who __10___ very good when you can go to __11___ some of the best players in your country __12___ an important match? You may just sit comfortably __13___ and watch the game without the __14___ of going outside.

　　The art of conversation and the ___15__ of playing and singing are __16___ ;people are becoming more and more lookers and listeners,and __17___ doers and talkers.This change does people __18___ ;it is ___19__ to do something than __20___ to sit and watch others doing it.

　　注释

　　1. amusement n.娱乐,消遣,娱乐活动

　　2. musical instrument乐器

　　3. conversation n.聊天

　　4. as for至于;就...方面说来

　　5. cricket n.板球

　　6. professional adj.职业(性)的,业务的

　　通读短文选出一个最佳答案

　　( )1A. harm B. pleasure C. changes D. danger

　　( )2A. busy B. free C. good D. day

　　( )3A. hundred B. thousand C. century D. few

　　( )4A. walked B. played C. met D. gathered

　　( )5A. First of all B. Above all C. After all D. At first

　　( )6A. art B. interest C. fun D. importance

　　( )7A. let B. make C. keep D. cause

　　( )8A. enjoyed B. played C. taught D. amused

　　( )9A. watch B. become C. hear D. admire

　　( )10A. is B. are C. is not D. are not

　　( )11A. join in B. play with C. see D. find

　　( )12A. acting B. enjoying C. joining D. playing

　　( )13A. at home B. at a cinema C. at a stadium D. at the playground

　　( )14A. problem B. trouble C. question D. difficulty

　　( )15A. art B. habit C. idea D. interest

　　( )16A. growing B. developing C. dying D. disappearing

　　( )17A. better B. worse C. more D. less

　　( )18A. more good than harm B. either good or harm C. more harm than good D. neither good nor harm

　　( )19A. good B. better C. bad D. worse

( )20A. always B. often C. sometimes D. never

　　判断正误

　　On the dark,cold floor of the Atlantic Ocean are several black cables.They stretch from the United States to Europe.Each cable looks like a thick garden hose.Inside the cables are wires carrying messages at a speed of 400 words per minute.If you wish,you can send a message to England for twentythree cents a word.

　　By 1856 there were telegraph wires on land,but there were none that crossed an ocean.An American,Cyrus W.Field,believed that telegraph wires could be laid on an ocean bottom.The wires could be put inside a thick cable.Men on British and American ships tried to put down the first Atlantic cable.They had many troubles.The cable broke again and again.

　　Field did not quit.In 1866 a new cable worked perfectly.Today,many undersea cables carry messages around the world.Sometimes it is hard to lay telephone cables,too.The ground may be rocky or hilly.Then a telephone company may put up a microwave tower.When it is built,the tower can carry longdistance messages cheaper and with less noise than a telephone makes.

　　注释

　　1. cable n.电缆

　　2. stretch vt.伸展,伸张,展开,铺开,把...拉直，拉长

　　3. garden hose橡胶软管

　　4. quit vt .& vi. (quitted或quit,quitting)停止；辞职

　　5. microwave n.微波

　　根据文章内容判断正误

　　( )1Undersea telegraph wires were put inside thick garden hoses.

　　( )2With the development of technology,it is very easy to lay telephone cables under the sea.

　　( )3The first Atlantic cable was not working well when it was completed then.

　　( )4Today,undersea cables are no longer used because microwave towers have been widely used.

　　参考答案

　　Passage 1

　　1. C众所周知，许多国家已经把卫星发射到太空。

　　2. D在卫星的帮助下，人们可以了解地球天气及其他许多有关地球的情况。

　　3. B"Most countries use these satellites to send and receive messages."此句已说明了答案。

　　4. B可以用卫星把电视广播节目传输到国外。

　　5.A由文章最后一句话可知，由于有了人造卫星，世界各地的人们可以更好地相互了解。

　　Passage 2

　　1. D越洋电视存在的问题是：无法在水中建造微法塔并且微波按地球曲度传播有困难。

　　2. A文章第三段最后一句"TV broadcasts would be shared internationally."说明：全世界都可共享这个卫星广播系统。3. A原文最后一段说明选项A符合题意。4. B文章并没有说到选项B所说的意思。5. C只有C项是正确答案，其他选项均非推断而知，即文中都有原话。

　　Passage 3

　　1. Cproduce great changes in意为"在…方面产生了巨大变化"。

　　2. Bpass ones free time意为"消磨时间"。

　　3. A选项A符合语法规则。

　　4. D此句意思应为"人们聚集在一起的时候"，gather together有"聚会"的意思。

　　5. Bfirst of all意为"首先"，above all意为"尤其重要的是"，after all意为"毕竟"，at first意为"首先"。

　　6. A空格前有不定冠词，此题必须选择可数名词。

　　7. C此句中有happy作宾补，能带形容词作宾补的只有make和keep，故keep符合句意。

　　8. D干扰项是A，因为此句后有their friends，选A说不通，故选D。

　　9. C一目了然，此句指的是"听"唱歌。

　　10. D定语从句中的时态或人称应与先行词保持一致。

　　11. Cwhen引导的时间状语从句中的结构是see sb. doing sth.。

　　12. Dplay a match意为"进行一次比赛"。

　　13. A和going outside相对应，选A符合题意。

　　14. B指外出观看比赛所带来的麻烦。

　　15. BB项和上文相呼应。

　　16. C此题应根据下文来判断。dying意为"消亡"或"不存在"，disappear意为"消失"。

　　17. D应结合上句进行判断，要用表示否定意义的词，故D符合题意。

　　18. C人们这种习惯的变化肯定是对身体有害无益。

　　19. B结尾句是对人们的忠告。根据句中的连词than应选形容词比较级。

　　20. Aalways语气要比often重，更能恰当地表达出作者的意思。

　　Passage 41. T"Each cable looks like a thick garden hose."这句话已经说明了电缆放的地方。

　　2. F现在铺设海底电缆也不是一件容易的事，因为海底下面到处是"rocky or hilly"。

　　3. T从"They had many troubles."这句话我们可知：在铺设第一条大西洋海底电缆时并不顺利，因为电缆时常断。

　　4. F由第三段第二句可知，尽管现在已经有了微波塔，但是海底电缆还在广泛地使用。

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