无阅读难点关键句1.Wearingaseatbeltsaveslives;itreducesyourchanceofdeathorseriousinjurybymorethanhalf.2.Butitwillbethedriver’sresponsibilitytomakesurethatchildrenunder14donotrideinthefrontunlesstheyarewearingaseatbeltofsomekind.3.However,youdonothavetowearaseatbeltifyouarereversingyourvehicle;oryouaremakingalocaldeliveryorcollectionusingaspecialvehicle;orifyouhaveavalidmedicalcertificatewhichexcusesyoufromwearingit.4.Rememberyoumaybetakentocourtfornotdoingso,andyoumaybefinedifyoucannotprovetothecourtthatyouhavebeenexcusedfromwearingit.5.ProfessorTaijuMatsuzawawantedtofindoutwhyotherwisehealthyfarmersinnorthernJapanappearedtobelosingtheirabilitytothinkandreasonatarelativelyearlyage,andhowtheprocessofageingcouldhesloweddown.6.WithateamofcolleaguesatTokyoNationalUniversity,hesetaboutmeasuringbrainvolumesofathousandpeopleofdifferentagesandvaryingoccupations.7.Computertechnologyenabledtheresearcherstoobtainprecisemeasurementsofthevolumeofthefrontandside无sectionsofthebrain,whichrelatetointellect（智能）andemotion,anddeterminethehumancharacter.8.Contractionoffrontandsidepartsascellsdieoffwasobservedinsomesubjectsintheirthirties,butitwasstillnotevidentinsomesixtyandseventy-year-olds.9.Thefindingsshowingeneraltermsthatcontractionofthebrainbeginssoonerinpeopleinthecountrythaninthetowns.10.Whitecollarworkersdoingroutineworkingovernmentofficesare,however,aslikelytohaveshrinkingbrainsasthefarmworker,busdriverandshopassistant.11.Weknowthatyouhaveahighopinionofthekindoflearningtaughtinyourcolleges,andthatthecostsoflivingofouryoungmen,whilewithyou,wouldbeveryexpensivetoyou.12.Butyoumustknowthatdifferentnationshavedifferentwaysoflookingatthings,andyouwillthereforenotbeoffendedifourideasofthiskindofeducationhappennottobethesameasyours.13.Weare,however,notthelessobligedbyyourkindoffer,thoughwerefusetoacceptit;and,toshowourgratefulsenseofit,ifthegentlemenofVirginiawillsendusadozenoftheirsons,wewilltakecareoftheireducation,teachthemin无allweknow,andmakemenofthem.14.Inwhatnowseemsliketheprehistorictimesofcomputerhistory,theearth’spostwarera,therewasquiteawide-spreadconcernthatcomputerswouldtakeovertheworldfrommanoneday.15.Alreadytoday,lessthanfortyyearslater,ascomputersarerelievingusofmoreandmoreoftheroutinetasksinbusinessandinourpersonallives.Wearefacedwithalessdramaticbutalsolessforeseenproblem.16.Obviously,therewouldbenopointininvestinginacomputerifyouhadtocheckallitsanswers,butpeopleshouldalsorelyontheirowninternalcomputersandcheckthemachinewhentheyhavethefeelingthatsomethinghasgonewrong.17.CertainlyNewtonconsideredsometheoreticalaspectsofitinhiswritings,buthewasreluctanttogotoseatofurtherhiswork.18.Formostpeopletheseawasremote,andwiththeexceptionofearlyintercontinentaltravellersorotherswhoearnedalivingfromthesea,therewaslittlereasontoaskmanyquestionsaboutit,letalonetoaskwhatlaybeneaththesurface.无19.Thefirsttimethatthequestion“Whatisatthebottomoftheoceans?”hadtobeansweredwithanycommercialconsequencewaswhenthelayingofatelegraphcablefromEuropetoAmericawasproposed.20.Attheearlyattempts,thecablefailedandwhenitwastakenoutforrepairsitwasfoundtobecoveredinlivinggrowths,afactwhichdefiedcontemporaryscientificopinionthattherewasnolifeinthedeeperpartsofthesea.21.Foreverycoursethathefollowsastudentisgivenagrade,whichisrecorded,andtherecordisavailableforthestudenttoshowtoprospectiveemployers.22....
