2022年6月英语四级阅读理解练习 （5） .docx

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1、2022年6月英语四级阅读理解练习 （5） 阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项Merchantandpassengershipsaregenerallyrequiredtohavealifepreserverforeverypersonaboardandinmanycases,acertainpercentageofsmallersizesforchildren.AccordingtoUnitedStatesrequirements,lifepreserversmustdesign,reversiblecapableofbeingquicklyadjusted

2、tofittheuninitiatedindividual,andmustbesodesignedastosupportthewearerinthewaterinanuprightorslightlybackwardposition.Sufficientbuoyancy(浮力)tosupportthewearershouldberetainedbythelifepreserverafter48hoursinthewater,anditshouldbereliableevenafterlongperiodofstorage.Thusitshouldbemadeofmaterialsresista

3、nttosunlight,gasoline,andoils,anditshouldbenoteasilysetonfire.?Thepositioninwhichthelifepreserverwillsupportapersonwhojumpsorfallsintothewaterismostimportant,asisitstendencytoturnthewearerinthewaterfromaface-downpositiontoanuprightorslightlybackwardposition,withhisfaceclearofthewater,evenwhenthewear

4、erisexhaustedorunconscious.Themethodofadjustmenttothebodyshouldbesimple,andself-evidenttouninitiatedpersonseveninthedarkundertheconfusedconditions,whichfollowadisaster.Thus,thelifebereversiblethatitisnearlyimpossibletogetitonwrong.Catches,straps,andtiesshouldbekepttoaminimum.Inaddition,thelifepreser

5、vermustbeadjustabletothewidevarietyofshapesandsizesofwearers,sincethisgreatlyaffectsthepositionoffloatingandtheself-rightingqualities.Asuitablelifealsobecomfortabletowearatalltimes,inandoutofthewater,notsoheavyastoencouragetotakeitoffonshipboardwhiletheshipisindanger,norsoburdensomethatithindersaper

6、soninthewaterwhiletryingtoswim.1Thepassageismainlyabout_.A)theusesoflifepreserversB)thedesignoflifepreserversC)thematerialsforlifepreserversD)thebuoyancyoflifepreservers查看原文2Accordingtothepassage,alifebefirstofall_.A)adjustableB)comfortableC)self-evidentD)self-righting查看原文3UnitedStatesCoastGuarddoes

7、NOTrequirethelifepreservertobemade_.A)withasfewstringsaspossibleB)capableofbeingwornonbothsidesC)accordingtoeachwearer'ssizeD)comfortableandlighttowear查看原文4Bytheuninitiatedindividual(Para.1,Line.4)theauthorreferstotheperson_.A)whohasnotbeeninstructedhowtousealifepreserverB)whohasalittleexperienc

8、einusingalifepreserverC)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