2021年6月大学英语六级阅读练习附答案(7).docx

第PAGE\*MERGEFORMAT4页共NUMPAGES\*MERGEFORMAT4页

2021年6月大学英语六级阅读练习附答案(7)

想要快速提高英语六级阅读水平，需要具备多方面能力，如知识面，词汇量，阅读技巧等。当然，最基本的提高六级阅读能力的方法，还是多练习，多做题。阅读文章：Merchantandpassengershipsaregenerallyrequiredtohavealifepreserverforeverypersonaboardand,inmanycases,acertainpercentageofsmallersizesforchildren.AccordingtoUnitedStatesCoastGuardrequirements,lifepreserversmustbesimpleindesign,reversible,capableofbeingquicklyadjustedtofittheuninitiatedindividual,andmustbesodesignedastosupportthewearerinthewaterinanuprightorslightlybackwardposition.Sufficientbuoyancy(浮力)tosupportthewearershouldberetainedbythelifepreserverafter48hourinthewater,anditshouldbereliableevenafterlongperiodofstorage.Thusitshouldbemadeofmaterialsresistanttosunlight,gasoline,andoils,anditshouldbenoteasilysetonfire.Thepositioninwhichthelifepreserverwillsupportapersonwhojumpsorfallsintothewaterismostimportant,asisitstendencytoturnthewearerinthewaterfromaface-downpositiontoanuprightorslightlybackwardposition,withhisfaceclearofthewater,evenwhenthewearerisexhaustedorunconscious.Themethodofadjustmenttothebodyshouldbesimple,andself-evidenttouninitiatedpersonseveninthedarkundertheconfusedconditionswhichfollowadisaster.Thus,thelifepreservershouldbereversible,sothatitisnearlyimpossibletosetitonwrong.Catches,straps,andtiesshouldbekepttoaminimum.Inaddition,thelifepreservermustbeadjustabletothewidevarietyofshapesandsizesofwearers,sincethisgreatlyaffectsthepositionoffloatingandtheself-rightingqualities.Asuitablelifepreservershouldalsobecomfortabletowearatalltimes,inandoutofthewater,notsoheavyastoencouragetotakeitoffonshipboardwhiletheshipisindanger,norsoburdensomethatithindersapersoninthewaterwhiletryingtoswim.21.Thepassageismainlyabout________.A)theusesoflifepreserversB)thedesignoflifepreserversC)thematerialsforlifepreserversD)thebuoyancyoflifepreservers22.Accordingtothepassage,alifepreservershouldbefirstofall,________.A)adjustableB)comfortableC)self-evidentD)self-righting23.UnitedStatesCoastGuarddoesNOTrequirethelifepreser