英语阅读理解和答案

1.FoodandHealthThefoodweeatseemstohaveprofoundeffectsonourhealth.Althoughsciencehasmadeenormousstepsinmakingfoodmorefittoeat,ithas,atthesametime,mademanyfoodsunfittoeat.Someresearchhasshownthatperhapseightypercentofallhumanillnessesarerelatedtodietandfortypercentofcancerisrelatedtothedietaswell,especiallycancerofthecolon.Differentculturesaremorepronetocontractcertainillnessesbecauseofthefoodthatischaracteristicinthesecultures.Thatfoodisrelatedtoillnessisnotanewdiscovery.In1945,governmentresearchersrealizedthatnitratesandnitrites,commonlyusedtopreservecolorinmeats,andotherfoodadditives,causedcancer.Yet,thesecarcinogenicadditivesremaininourfood,anditbecomesmoredifficultallthetimetoknowwhichthingsinthepackaginglabelsofprocessedfoodarehelpfulorharmful.Theadditiveswhichweeatarenotallsodirect.Farmersoftengivepenicillintobeefandpoultry,andbecauseofthis,penicillinhasbeenfoundinthemilkoftreatedcows.Sometimessimilardrugsareadministeredtoanimalsnotformedicinalpurposes,butforfinancialreasons.Thefarmersaresimplytryingtofattentheanimalsinordertoobtainahigherpriceonthemarket.AlthoughtheFoodandDrugAdministration(FDA)hastriedrepeatedlytocontroltheseprocedures,thepracticescontinue.1.Whatisthebeatpossibletitleofthepassage?A.DrugandFoodB.CancerandHealthC.FoodandHealthD.HealthandDealth2.WhichofthefollowingstatementsisNottrue?A.Drugsarealwaysgiventoanimalsformedicalreasons.B.Someoftheadditivesinourfoodareaddedtothefooditselfandsomearegiventothelivinganimals.C.Researchershaveknownaboutthepotentialdangersoffoodadditivesforoverthirty_fiveyears.D.Foodmaycausefortypercentofcancerinworld.3.Howhassciencedonesomethingharmfultomankind?A.Becauseofscience,diseasescausedbypollutedfoodhavenbeenvirtuallyeliminated.B.Ithascausedalackofinformationconcerningthevalueoffood.C.Becauseoftheapplicationofscience,somepotentiallyharmlysubstanceshavebeenaddedtofood.D.Thescientistshavepreservedthecolorofmeats,butnotofvegetables.4.Whatarenitratesusedfor?A.Theypreserveflavorinpackagedfoods.B.Theypreservethecolorofmeats.C.Theyaretheobjectsofresearch.D.Theycausetheanimalstobecomefatter.5.Theword'carinogenic'mostnearlymeans'_____'A.trouble_makingB.color_retainC.money_makingD.cancer_causingcacbd2.Asthepaceoflifecontinuestoincrease,wearefastlosingtheartofrelaxation.Onceyouareinthehabitofrushingthroughlift,beingonthegofrommorningtillnight,itishardtoslowdown.Butrelaxationisessentialforahealthymindandbody.Stressisanaturalpartofeverydaylifeandthereisnowaytoavoidit.Infact,itisnotthebadthingitisoftensupposedtobe.Acertainamountofstressisvitaltoprovidemotivationandgivepurposetolife.Itisonlywhenthestressgetsoutofcontrolthatitcanleadtopoorperformanceandillhealthy.Theamountofstressapersoncanwithstanddependsverymuchontheindividual.Somepeoplearenotafraidofstress,andsuchcharactersareobviouslyprimematerialformanagerialresponsibilities.Othersloseheartatthefirstsignsofunusualdifficulties.Whenexposedtostress,inwhateverform,wereactbothchemicallyandphysically.Infactwemakechoicebetweenfightorflightandinmoreprimitivedaysthechoicemadethedifferencebetweenlifeordeath.Thecriseswemeettodayareunlikelytobesoextreme,buthoweverlittlethestressis,itinvolvesthesameresponse.Itiswhensuchareactionlastslong,throughcontinuedexposuretostress,thathealthbecomesendangered.Suchseriousconditionsashighbloodpressureandheartdiseasehaveestablishedlinkswithstress.Sincewecannotremovestressfromourlives(itwouldbeunwisetodosoevenifwecould),weneedtofindwaystodealwithit.1.Peoplearefindinglessandlesstimeforrelaxingthemselvesbecause_____.A.theydonotknowhowtoenjoythemselvesB.theydonotbelievethatrelaxationisimportantforhealthC.theyaretravellingfastallthetimeD.theyarebecomingbusierwiththeirwork2.Accordingtothewriter,themostimportantcharacterforagoodmanagerishis________.A.notfearingstressB.knowingtheartofrelaxationC.highsenseofresponsibilityD.havingcontroloverperformance3.Whichofthefollowingstatementsistrue?A.Wecanfindsomewaystoavoidstress.B.Stressisalwaysharmfultopeople.C.Itiseasytochangethehabitofkeepingoneselfbusywithwork.D.Differentpeoplecanwithstanddifferentamountsofstress.4.InParagraph3,suchareactionrefersbackto_______.A.makingachoicebetween'flight'or'fight'B.reactiontostressbothchemicallyandphysicallyC.respondingtocrisesquicklyD.losingheartatthesignsdifficulties5.Inthelastsentenceofthepassage,dosorefersto______.A.exposeourselvestostressB.findwaystodealwithstressC.removestressfromourlivesD.establishedlinksbetweendiseasesandstressDADBC3.Today,asineveryotherdayoftheyear,morethan3000U.S.adlescentswillsmoketheirfirstcigaretteontheirwaytobecomingregularsmokersasadults.Duringtheirlifetime,itcanbeexpectedthatofthese3000about23willbemurdered,30willdieintrafficaccidents,andnearly750willbekilledbyasmoking-relateddisease.Thenumberofdeathsattributedtocigarettesmokingoutweithtsallotherfactors,whethervoluntaryorinvoluntary,asacauseofdeath.Sincethelate1970s,whendailysmokingamonghighschoolseniorsreached30precent,smokingratesamongyouthhavedeclined.Whilethedeclineisimpressive,severalimportantissuesmustberaised.First,inthepastseveralye