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,"Fornarisays."Wecanwalkaroundandseewithoureyeshowbigthingsare.Wecanseecolors,specialarrangements."

Size-wise,thenewHOVwillbesimilartoAlvin.It'llbeabout37feetlong.Thesettingareainsidewillbeasmallsphere,about8feetwide,likeAlvin,it'llcarryapilotandtwopassengers.Itwillbejustasmaneuverable.Inmostotherways,itwillgivepassengersmoreopportunitiestoenjoytheview,foronething.Alvinhasonlythreewindows,thenewvehiclewillhavefive,withmoreoverlapsothatthepassengersandthepilotcanseethesamething.

Alvincangoupanddownatarateof30meterseverysecond,anditsmaximumspeedis2knots(about2.3milesperhour),whilethenewvehiclewillbeabletoascendanddescendat44meterspersecond.It'llreachspeedsof3knots,or3.5milesperhour.(361words)

词汇:

fraction/(fr(k((n/n.一部分dive/da(v/v.&,n.潜水,跳水underwater/((nd((w((t(/adj.水下的,adv.在水下bound/ba(nd/adj.受约束的,一定的manned/m(nd/adj.载人的sphere/sf(((r)/n.球体,范围undersea/((nd(si(/adj.海底的maneuverable/m((nu(v(r(bl/adj.机动的,可调动的submersible/s(b(m((s(bl/n.潜艇,潜水器overlap/((((v((l(p/v.&,n.重叠upgrade/((p(re(d/n.升级ascend/((send/v.上升geologist/d((((l(d((st/n.地质学家

注释:

WoodsHole:美国马萨诸塞州的一个渔村,但同时拥有许多重要研究机构,如:theMarineBiologicalLaboratory,theSeaEducationAssociation以及theWoodsHoleOceanographicInstitution.

Alvin:世界上第一个深海潜水器,它最有名的深海探测包括1986年对泰坦尼克号残骸的测量工作.

练习:

WhatisAlvin

A)Aresearchinstitute.

B)Atransportingvehicle.

C)Asubmersible.

D)Ascientist.

WhichofthefollowingstatementsisNOTafactaboutAlvin

A)Itcancarryexplorersasdeepas6,500meters.

B)Ithasplayedakeyroleinvariousimportantunderseaexpeditions

C)Itwaslaunchedinthesixtiesofthetwentiethcentury.

D)Ithasbeenusedformorethan40years.

3."等aworldthatisstillfullofmysteries"refersto

A)Theearth.

B)Outspace.

C)Theocean.

D)Mars.

4.InwhataspectsarethenewHOVandAlvinsimilar

A)Size.

B)Speed.

C)Capacity.

D)Shape.

5.InwhataspectsarethenewHOVandAlvindifferent

A)Offeringbetterviews.

B)Speed.

C)Size.

D)BothAandB.

答案与题解:

1.C短文第一段的第二,第三句提供了答案.

2.A文章第二段的第二句说,科学家正在研制一艘可将研究人员带到6,500米深处的潜水装置,而它将替代Alvin,因为Alvin只能潜到4,500米深处.A不是事实,所以是正确选择.

3.C本文讨论探索海底世界的潜水装置,所以"充满神秘色彩的世界"指的就是海洋.

4.D第四段的头三个句子告诉我们,HOV和Alvin在体积上和容量上相似.所以D是正确选择.

5.D第四段最后两句告诉我们,Alvin只有三个窗户,而HOV有五个.最后一段告诉我们,两艘潜水装置的上下活动速度和行进速度有所差别.所以D是正确选择.

9.PlantGas(C级)

(替换2007年用书理工类阅读理解第二十一篇:TheGeneIndustry)

Scientistshavebeenstudyingnaturalsourcesofmethanefordecadesbuthadn'tregardedplantsasaproducer,notesFrankKeppler,ageochemistattheMaxPlanckInstituteforNuclearPhysicsinHeldelberg,Germany1.NowKepplerandhiscolleaguesfindthatplants,fromgrassestotrees,mayalsobesourcesofthegreenhousegas.Thisisreallysurprising,becausemostscientistsassumedthatmethaneproductionrequiresanoxygen-freeenvironment.

Previously,researchershadthoughtthatitwasimpossibleforplantstomakesignificantamountsofthegas.Theyhadassumedthatmicrobes2needtobeinenvironmentswithoutoxygentoproducemethane.Methaneisagreenhousegas,likecarbondioxide.GasessuchasmethaneandcarbondioxidetrapheatinEarth'satmosphereandcontributetoglobalwarming.

Initsexperiments,Keppler'steamusedsealedchambersthatcontainedthesameconcentrationofoxygenthatEarth'satmospherehas.Theymeasuredtheamountsofmethanethatwerereleasedbybothlivingplantsanddriedplantmaterial,suchasfallenleaves.

Withthedriedplants,theresearcherstookmeasurementattemperaturesrangingfrom30degreesCelsiusto70degreesC.At30degreesC,theyfound,agramofdriedplantmaterialreleasedupto3nanogramsofmethaneperhour.(Onenanogramisabillionthofagram.)Withevery10-degreeriseintemperature,theamountofmethanereleasedeachhourroughlydoubled.

Livingplantsgrowingattheirnormaltemperaturesreleasedasmuchas370nanogramsofmethanepergramofplanttissueperhour.Methaneemissionstripledwhenlivinganddeadplantwasexposedtosunlight.

Becausetherewasplentyofoxygenavailable,it'sunlikelythatthetypesofbacteriathatnormallymakemethanewereinvolved.Experimentsonplantsthatweregrowninwaterratherthansoilalsoresultedinmethaneemissions.That'sanotherstrongsignthatthegascamefromtheplantsandnotsoilmicrobes.

Thenewfindingisan"interestingobservation,"saysJenniferY.King,abiogeochemistattheUniversityofMinnesotainSt.Paul3.Becausesometypesofsoilmicrobesconsumemethane,theymaypreventplant-producedmethanefromreachingtheatmosphere.Fieldtestswillbeneededtoassesstheplant'sinfluence,shenotes.(367words)

词汇:

methane/(mi(((e(n/n.甲烷,沼气emission/((m(((n/n.散发,发射geochemist/(((d((((((kem(st/n.地球化学家triple/(tr(pl/v.增加三倍,adj.三倍的Celsius/(selsj(s/n&,adj.摄氏(的)bacteria/b(k(t((r((/n.(bacterium的复数)细菌microbe/(ma(kr((b/n.微生物

nanogram/(n(n((r(m/n.微克biogeochemist/(ba((((((d((((((kem(st

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