听力教程第三册答案UNIT7

SectionOnePart1SpotDictationMeetYourChiropractor(1)well-recognized(11)affecting(2)considers(12)healthdisorders(3)unit(13)familydoctor(4)muscles(14)diagnosis(5)systems(15)necessary(6)relieve(16)goesinto(7)spine(17)limittheirpractices(8)nervesystem(18)sportsinjuries(9)backpain(19)licensedandregulated(10)interferewith(20)licensingPart2listeningforGistThetopicsentenceis“Theplaceitselfisextremelyprimitive.”SectionTwoListeningComprehensionPart1DialogueAHealthyLifeA.Cholesterol Definition Ayellowish,wax-like substance,whichisproducednaturallyinourlivers. Function Weallneedsomecholesterolinorderto insulateournerves,andtoproducecellmembranesandhormones. Overproduction Whencholesterolbuildsupinourarteries,itcausesthemtogetnarrower,sothatourbloodsupplyhasdifficultyingettingthrough andthiscaneventuallyendinaheartattack orstroke. Howtoavoidthis overproduction Bycuttingdownourconsumptionofanimalfats:thingslikeredmeat,cheese,eggs,andsoon.Andbyincreasingourconsumptionoffreshfruit andvegetables,andalsobyeatingmore potatoes,rice,pasta andbread.B.Exercise Formsofexercise warnedagainst Anumberofinjuriesareduetosudden,twisting movementsthatgameslikesquash involve. Formsofexerciserecommended Gentlejogging,swimming,cycling,briskwalking ...exercisethatisrhythmic andgentle. Thingstoberemembered Exerciseshouldbesustained,thatis,doneforatleastfifteenminutes uninterruptedlyatleastthreetimes aweek.Part2PassageAgingofAmericaExerciseBTheimpendingcollisionbetweentheboomersandthenation’sretirementsystemisnaturallycatchingtheeyeofpolicymakersandtheboomersthemselves.RetirementincomesecurityintheUnitedStateshastraditionallybeenbasedontheso-calledthree-leggedstool:SocialSecurity,privatepensions,andotherpersonalsaving.Retirementplanningtakestime,andtheseissuesneedtobeaddressedsoonerratherthanlater.Onefoundthatin1991themedianhouseholdheadedbya65-69-year-oldhadfinancialassetsofonly$14,000,butexpandingthemeasuretoincludeSocialSecurity,pensions,housing,andotherwealthboostsmedianwealthtoabout$270,000.OnlyoneortwogenerationsofAmericanshavehadlengthyretirements,andthecrucialretirementissueskeepchangingrapidly,makinglong-termpredictionsevenharder.ExerciseCDDBBCCACExerciseD1.Theboomershavealteredeconomicpatternsfromjammingthenation’sschoolsinthe1950sand1960s,tocrowdinglabormarketsandhousingmarketsinthe1970sand1980s,toaffectingconsumptionpatternsalmostcontinuously.(Open.)SectionThreeNewsNewsitem1ExerciseAThis news item is about theimpactofmother’sdietonbabyevenbeforepregnancy.ExerciseBTFFTFTTFNewsitem2ExerciseAThisnewsitemisabouttheshortageofvaccinesindevelopingcountries.ExerciseBavailable;developingcountries;50percent;immunized;fewer;oneintwenty;buyvaccines;discounted;moreproductioninthedevelopingworld;huge;130millionchildren;thecountriesofthedevelopedworldNewsitem3ExerciseAThisnewsitemisaboutanAIDSvaccinetestinThailandwhichshowssomepromiseincombatingthedisease.ExerciseB1.AnexperimentalAIDSvaccinehasprovedpartlyeffectiveinatestinThailand.2.Becauseforavarietyofreasons,HIVhasstymiedeffortstodevelopavaccine.3.Thisnewvaccinewasonlyabout31percenteffective.4.Thelimitedsuccessmayhelpresearchersimproveitseffectiveness.5.Yes,itisthelargesteverattempted.6.TheUnitedNationsestimatesthatAIDSkilledtwomillionpeoplein2007.SectionFourSupplementaryExercisesPart1FeaturereportWorldTBDayExerciseAThisnewsreportisaboutTBcontrol.ExerciseBFFTTFTFFPart2PassageOpenCookStovesPutWomenatRiskExerciseBSentenceDictationAllaroundtheworld,womencookoveropenwoodstoves,anddoingthisputstheirhealthatseriousrisk.Hestudiedwomeninmorethan500householdstofindoutwhatkindsofthingstheywereexposedtobyusingtheseoldfashionedstoves.NowsomeresearchfromMexicoshowsthatusinganewmoreefficientstovecansaveawoman’slungs.Themoreefficientceramic-linedstoveshavechimneysthatchannelthesmokeoutside.Wearetryingtomakesomemorespirometrieswiththewomenandwealsowanttodobettermeasurementsoftheimpactofthisstoveinchildren.ExerciseCDetailedListeningADCDDBBCExerciseDAfter-ListeningDiscussion1.Allaroundtheworld,womencookoveropenwoodstoves,anddoingthisputstheirhealthatseriousrisk.Anestimatedtwobillionpeopleworldwiderelyonbiomassfuels,suchaswoodtocooktheirdailymeals.Thisfuelisoftenburnedininefficient,smokystovesthatproduceexcessheat,smoke,sootanddangerousgases.Riojassaysthewomencookingoveropenfireshadlungfunctionsimilartopeoplewhosmokeapackofcigarettesaday.2.(Open.)