大学英语四级（CET-4）阅读理解专题强化训练一.docx

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1、大学英语四级（CET-4）阅读理解专题强化训练一攻克阅读理解这一版块，需要你平时的大量练习，培养快速从大量信息中提取要点的能力；这里我们将提供大量的阅读理解专项训练，它们将是你通向成功的得力助手！Merchantandpassengershipsaregenerallyrequiredtohavealifepreserverforeverypersonaboardandinmanycases,acertainpercentageofsmallersizesforchildren.AccordingtoUnitedStatesrequirements,lifepreserversmustdesi

2、gn,reversiblecapableofbeingquicklyadjustedtofittheuninitiatedindividual,andmustbesodesignedastosupportthewearerinthewaterinanuprightorslightlybackwardposition.Sufficientbuoyancy(浮力)tosupportthewearershouldberetainedbythelifepreserverafter48hoursinthewater,anditshouldbereliableevenafterlongperiodofst

3、orage.Thusitshouldbemadeofmaterialsresistanttosunlight,gasoline,andoils,anditshouldbenoteasilysetonfire.?Thepositioninwhichthelifepreserverwillsupportapersonwhojumpsorfallsintothewaterismostimportant,asisitstendencytoturnthewearerinthewaterfromaface-downpositiontoanuprightorslightlybackwardposition,

4、withhisfaceclearofthewater,evenwhenthewearerisexhaustedorunconscious.Themethodofadjustmenttothebodyshouldbesimple,andself-evidenttouninitiatedpersonseveninthedarkundertheconfusedconditions,whichfollowadisaster.Thus,thelifebereversiblethatitisnearlyimpossibletogetitonwrong.Catches,straps,andtiesshoul

5、dbekepttoaminimum.Inaddition,thelifepreservermustbeadjustabletothewidevarietyofshapesandsizesofwearers,sincethisgreatlyaffectsthepositionoffloatingandtheself-rightingqualities.Asuitablelifealsobecomfortabletowearatalltimes,inandoutofthewater,notsoheavyastoencouragetotakeitoffonshipboardwhiletheshipi

6、sindanger,norsoburdensomethatithindersapersoninthewaterwhiletryingtoswim.1Thepassageismainlyabout_.A)theusesoflifepreserversB)thedesignoflifepreserversC)thematerialsforlifepreserversD)thebuoyancyoflifepreservers查看原文2Accordingtothepassage,alifebefirstofall_.A)adjustableB)comfortableC)self-evidentD)se

7、lf-righting查看原文3UnitedStatesCoastGuarddoesNOTrequirethelifepreservertobemade_.A)withasfewstringsaspossibleB)capableofbeingwornonbothsidesC)accordingtoeachwearer'ssizeD)comfortableandlighttowear查看原文4Bytheuninitiatedindividual(Para.1,Line.4)theauthorreferstotheperson_.A)whohasnotbeeninstructedhowt

8、ousealifepreserverB)whohasalittleexperienceinusingalifepreserverC)whousesalifepreserverwithoutpermissionD)whobecomesnervousbeforeadisaster查看原文5Whatwouldhappenifapersonweresupportedbythelifepreserverinawrongposition?A)Thewaveswouldmovehimbackwards.B)Thewaterwouldchokehim.C)Hewouldimmediatelysinktothebottom.D)Hewouldbeexhaustedorunconscious.查看原文第4页 共4页第 4 页 共 4 页第 4 页 共 4 页第 4 页 共 4 页第 4 页 共 4 页第 4 页 共 4 页第 4 页 共 4 页第 4 页 共 4 页第 4 页 共 4 页第 4 页 共 4 页第 4 页 共 4 页