全国职称英语等级考试试题-理工类.pdf
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1、全国职称英语等级考试试题(理工类)1第 一 部 分 阅 读 理 解(75分)Passage 1CATV is a short way of saying community antenna(天线)television.But cable television“is theterm most people use.Cable television allowsviewers to receive TV programs that they cannotpick up with their regular antennas.Television signals do not follow the
2、curve(曲线)of the earth.They travel in straight lines inall directions.Signals from a TV station movetoward the horizon(水平线)and then go intospace.If you live only a few miles from astation,you may not get any picture at all.CATV began in 1948.People in places far from TVstations shared the cost of put
3、ting up highantennas.A community antenna was usually placedon a hill,a mountain,or on a high tower.Theantenna picked up TV signals and fed them into asmall local station.From the station,thick wirescalled cables ran out to nearby homes.Eachperson using the cable paid a monthly charge.CATV worked wel
4、l,and soon new uses were foundfor it.Local stations could feed programs intoempty channels that were not in use.People alongthe cable could have local news,weather reports,and farm and school news at no extra charge.Today,cable television has moved into cities.Itbrings in extra programs that city vi
5、ewers withregular antennas cannot see.It is also used inmany classrooms throughout the country.1.From the first paragraph we know that、OA.most people use cable televisionOB.community antenna“is another name for“regular antenna”OC.a community antenna is used for cabletelevisionOD.regular antennas can
6、not pick up TV signalsprograms2.Of the following,which is NOT the way TVsignals travel?OA.In a curve.OB.In a straight line.OC.In all direction.OD.Toward the horizon.3.Cable TV is becoming more and popular becauseOA.it is free of chargeOB.it can provide more programsOC.it provides all TV users good p
7、icturesOD.TV sets with regular antennas can also havea good reception through C A TV4.On the whole,this passage is about.OA.how to put up high antennasOB.a way of picking up better TV programsOC.how to use the empty channels on your T VsetOD.the way that TV signals are sent5.From the passage we can
8、infer that.OA.TV has begun to be used for educationalpurposesOB.there is no charge for CATVOC.cable TV cannot be used in mountainous areasOD.antennas for cable TV are usually put up inthe center of a communityPassage 2In earliest times,men considered lightning to beone of the great mysteries of natu
9、re.Someancient people believed that lightning and thunderwere the weapons of the gods.In reality,lightning is a flow of electricityformed high above the earth.A single flash oflightning 1.6 kilometers long has enoughelectricity to light one million light bulbs.The American scientist and statesman,Be
10、njaminFranklin,was the first to show the connectionbetween electricity and lightning in 1752.In thesame year he also built the f irst lightning rod.This device protects buildings from damage bylightning.Modern science has discovered that one stroke of1ighting contains more than 15 million volts.Aspa
11、rk between a cloud and the earth may be aslong as 13 kilometers,and travel at a speed of30 million meters per second.Scientists estimate that there are about 2000million flashes of lightning per year.Lightninghits the Empire State Building in New York City30 to 48 times a year.In the United Statesal
12、ong it kills an average of one person everyday.The safest place to be in case of an electricalstorm is in a closed car.Outside,one should goto low ground and not get under trees.Also,oneshould stay out of water and away from metalfences.Inside a house,people should avoid opendoorways and windows and
13、 not touch wires or metalthings.With lightning,it is better to be safe thansorry!6.Lightning is really.OA.weaponOB.electricityOC.lightOD.mystery7.People once though that lightning came fromOA.scientistsOB.groundOC.lightning rodOD.gods8.One flash of lightning can produce enoughelectricity for bulbs.O
14、A.10,000OB.1,000OC.1,000,000OD.1009.Be n j a m i n F r a n k l i n .O A.m a d e t h e f i r s t l i g h t n i n g r o dO B.i n v e n t e d e l e c t r i c i t yO C.b u i l t t h e Em p i r e S t a t e Bu i l d i n gO D.p r e v e n t e d L i g h t n i n g f r o m h i t t i n g c a r s10.i s t h e b e
15、 s t p l a c e t o b e d u r i n g a ne l e c t r i c a l s t o r m.O A.S w i m m i n g p o o lO B.a h i g h g r o u n dO C.U n d e r a t r e eO D.A c a rP a s s a g e 3Be c a u s e o f t h e e n e r g y c r i s i s,s c i e n t i s t s i n t h eo i l-c o n s u m i n g n a t i o n s h a v e b e c o m
16、 e i n c r e a s i n g l yi n t e r e s t e d i n t h e p o t e n t i a l (潜在的)o f s o l a r e n e r g y.S o m e e x p e r t s e s t i m a t e t h a t t h e p r e s e n t s u p p l y o ff o s s i l (化石)f u e l w i l l n o t l a s t u n t i l t h e e n dof the twentieth century.The problem that solar
17、energy researchers face is how to harness 俐 用)the sun,s energy effectively and inexpensively.Oneof the most popular methods currently being testeduses rooftop solar collectors and undergroundstorage tanks.An advantage of a properly workingsystem of this type is that it will not createany environment
18、al pollution.Another advantage ofusing solar energy is that the cost of thefuel-the suns rays-is zero.When a solar heatingsystem is working at maximum(最大的)efficiency,it can provide up to 80 percent of winterheating needs.11.The main topic of this passage is.OA.the shortage of fossil fuelOB.the probl
19、ems that energy researchers faceOC.an environmental pollution problemOD.an inexpensive energy source12.One popular solar heating system makes use ofOA.roof collectors and underground storageOB.fossil fuel conversionOC.underground oil tanksOD.water collection and evaporation13.The cost of using the s
20、un,s rays for heatingis.OA.about the same as the cost of fossil fuelsOB.several hundred dollars per yearOC.negligible compared with other energy sourcesOD.determined by the severity of the winter14.Which of the following describes an advantageof using solar energy?OA.There is little or no environmen
21、tal pollution.OB.A large percentage of fuel costs can besaved.OC.Fossil fuels will become more plentiful.OD.The oil-consuming nations will not have toimport oil.15.According to some experts,the supply offossil fuel will not last.OA.one more centuryOB.an indeterminable timeOC.until the end of this ce
22、nturyOD.indefinitely第 二 部 分 完 成 句 子(25分)根据短文内容完成句子,每个空格只能填一个单词。有的单词第一个字母已经给出,请将其余字母补全。Not long ago,an airplane was flying over NewZealand.There was a television camera crew onboard.Suddenly,out in the night sky,a brightsphere(球体)came into view.Everyone on boardsaw it and everyone though,UFO-Unidenti
23、fiedFlying Object.The camera crew went into actionand started filming.That week people all overthe world saw the film of this mysterious lighton their television screens.What was it?Was ita spaceship full of visitors from another planet?The captain of the aeroplane and the film crewbelieved it was.O
24、ther observers had manydifferent explanations.Some said it was Venus(金星).Others said it was just a trick of light.An air traffic controller also saw it on hisradar screen.He thought that a flock of birdswas causing dots on his radar screen when theUFO appeared.Most astronomers now believe that what
25、thesepeople saw was almost certainly the planet Venus.At that time of year it is very bright and easyto see.And from a moving aeroplane it canappear to be moving fast.So far there is noproof that UFOs or spaceships from other planetsdo exist.These years investigators of UFOs haveinvestigated thousan
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