大学英语四级考试模拟试题（七_娱乐_首都热线北京最大的综合门户网站之一

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大学英语四级考试模拟试题（七

网上收集 2008/1/31 12:43:36

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Directions:　There　are　four　reading　passages　in　this　part.　Each　passage　is　followed　by　some　questions.　For　each　question　there　are　four　suggested　answers　marked　A,　B,　C　and　D.　You　should　choose　the　one　best　answer　and　blacken　the　corresponding　letter　on　the　ANSWER　SHEET　with　a　pencil.
Passage　1

How　do　you　send　a　message　to　a　submerged　submarine,　particularly　one　carrying　mi　Water　may　not　look　like　a　barrier　to　communications,　but　appearances　are　deceiving.　Water　strongly　absorbs　all　electromagnetic　waves　except　blue　green　light　and　extremely　low　frequency　radio　waves.　The　very　low　frequency　waves　now　used　to　contract　submarines　penetrates　only　a　short　distance　into　the　ocean,　so　the　craft　must　either　surface　or　send　up　and　antenna　(天线)　to　receive　messages,　thereby　increasing　its　weakness.　A　laser　system　---　accurate　over　long　distances　and　capable　of　carrying　more　data　than　the　very　low　frequency　waves　---　would　talk　to　submarine　at　their　normal　depths.

In　the　system,　a　very　broad　beam　spreading　out　freely　in　all　directions　would　be　scanned　(扫描)　over　thousands　of　square　miles　of　ocean　so　that　it　wouldn't　endanger　boats,　birds　or　fish——or　the　submarines　it　is　supposed　to　reach.

Since　only　a　small　fraction　of　the　laser　system　will　make　its　way　through　the　air　and　ocean,　receivers　mounted　on　the　submarines　must　be　able　not　only　to　detect　the　laser　but　also　to　discriminate　between　it　and　sunlight.　So,　military　scientists　are　now　working　hard　on　special　filter　that　allow　through　only　the　precise　wavelengths　emitted　by　the　laser.　The　filtered　light,　when　transformed　into　electrical　signal,　can　then　be　decoded.　Military　planners　are　confident　that　laser　communication　with　submarines　is　feasible.

1.　Which　of　the　following　does　the　passage　mainly　discuss?
　
　　A.　Missiles　carried　by　submerged　submarines.
　　B.　Messages　sent　by　submerged　submarines.
　　C.　Blue-green　lasers　used　by　submerged　submarines.
　　D.　The　way　to　send　a　message　to　submerged　submarines.

2.　Which　of　the　following　is　TRUE　according　to　the　passage?

　　A.　Water　is　a　barrier　to　radio　communication.
　　B.　Lasers　have　found　wide　application　in　submarine　communication.
　　C.　Water　absorbs　all　kinds　of　electromagnetic　waves.
　　D.　Very　low　frequency　radio　waves　cannot　be　used　to　contact　submarines.

3.　Which　of　the　following　is　NOT　true　of　a　laser　system?

　　A.　It　is　able　to　make　its　way　through　water.
　　B.　It　is　able　to　communicate　with　submarines　at　work.
　　C.　Its　beam　reaches　a　submerged　submarine　with　the　help　of　an　antenna.
　　D.　It　is　able　to　carry　more　data　than　low　frequency　waves.

4.　The　reference　word　“it”　(Sentence　1,　para.3)　refers　to　.

　　A.　the　air　
　　B.　the　laser　beam　
　　C.　the　ocean　
　　D.　the　submarine

5.　Who　would　be　very　much　interested　in　the　passage?

　　A.　Missile　builders　
　　B.　Military　scientists　
　　C.　Fishermen　
　　D.　Ship　builder

Passage　2

　　　　　　　The　West　begun　to　take　more　notice　of　the　East.　The　fifth　volume　of　an　enormous　work　re-assessing　the　Chinese　contribution　to　science　and　technology　is　to　be　published　next　year.　The　first　volume,　which　was　published　twenty　years　ago,　set　the　tone　for　the　whole　work.　In　it,　evidence　was　given　to　show　that　many　inventions　which,　until　then,　western　historians　had　claimed　for　Europe,　were　made　first　in　China.　The　attempt　to　rewrite　the　intellectual　history　of　the　world　was　not　received　without　protest　by　some　reputable　historians.　However,　the　evidence　that　has　been　presented　so　far　in　the　first　four　volumes　has　persuaded　many　historians　who　were　skeptical　at　first.　China's　invention　of　paper,　printing,　the　magnetic　compass　and　gunpowder　has　never　been　disputed,　but　this　new　history　has　added　advanced　bridge　design,　mechanical　clocks,　paddle　boats　and　many　other　inventions　to　the　list.　

　　　　　　In　the　four　volumes　published　so　far　no　attempt　has　been　made　to　explain　why　China　has　not　kept　up　with　the　West　in　science　and　technology　in　modern　times.　It　is　probable　that　the　answer　is　to　be　found　in　the　social　and　economic　history　of　China,　where　a　static　society　under　a　relatively　benevolent　regime　of　scholar-gentry　contrasts　with　the　potentially　revolutionary　and　dynamic　society　of　the　West　at　the　end　of　the　Middle　Ages.　In　recent　years,　the　Chinese　government　has　been　making　every　effort　to　catch　up　with　the　West　again,　and　there　is　little　doubt　that　the　gap　is　being　reduced　year　by　year.　But　will　China　avoid　the　West's　mistakes?　

6.　So　far,　how　many　volumes　have　been　published?　

　　A.　Five.　
　　B.　Four.　
　　C.　Three.　
　　D.　None.　

7.　The　first　volume　was　published　.　

　　A.　ten　years　ago
　　B.　last　year　
　　C.　five　years　ago　
　　D.　twenty　years　ago　

8.　In　Line　7,　the　word　“skeptical"　means　.　

　　A.　doubtful　
　　B.　worried　
　　C.　sad　
　　D.　angry　

9.　Which　of　the　following　is　not　mentioned　in　the　passage?　

　　A.　Gunpowder.　
　　B.　Needle.　
　　C.　Paddle　boats.　
　　D.　Bridge　design.

10.　The　best　title　for　this　passage　is　.　

　　A.　China's　Inventions　
　　B.　Comparisons　Between　the　East　and　the　West　
　　C.　China　Is　Catching　Up　
　　D.　Situations　in　China　

Passage　3

　　　　　　Within　fifteen　years　Britain　and　other　nations　should　be　well　on　with　the　building　of　huge　industrial　complexes　for　the　recycling　of　waste.　The　word　rubbish　could　lose　its　meaning　because　everything　which　goes　into　the　dustbin　would　be　made　into　something　useful.　Even　the　most　dangerous　and　unpleasant　wastes　would　provide　energy　if　nothing　else.　

　　　　　　　The　new　concept　of　recycling　waste　is　taking　shape　at　the　British　technological　laboratory　at　Warren　Spring,　not　far　from　the　north　of　London.　Today,　the　laboratory　spends　four　times　as　much　money　in　studying　recycling　as　it　did　five　years　ago.　

　　　　　　　The　latest　project　is　to　take　a　city　of　around　half　a　million　inhabitants　and　discover　exactly　what　raw　materials　go　into　it　and　what　go　out.　The　aim　is　to　find　out　how　much　of　these　raw　materials　could　be　provided　if　a　plant　for　recycling　waste　were　built　just　outside　the　city.　This　plant　would　recycle　not　only　metal　such　as　steel,　lead　and　copper,　but　also　paper　and　rubber　as　well.　Methods　have　been　discovered,　for　example,　for　removing　the　ink　from　newsprint　so　that　the　paper　can　be　used　again,　and　for　obtaining　valuable　oils　and　gases　from　old　motor　car　types.　All　these　ideas　are　already　being　made　use　of,　but　what　is　new　is　the　idea　of　combining　them　on　such　a　large　scale　in　a　single　plant　designed　to　recycle　most　types　of　waste.　

　　　　　　Another　new　project　is　being　set　up　to　discover　the　best　

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