资源描述：
《考研 英语 冲刺班 阅读 第九讲》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、Passage3Islanguage,likefood,abasichumanneedwithoutwhichachildatacriticalperiodoflifecanbestarvedanddamaged?JudgingfromthedrasticexperimentofFrederickⅡinthethirteenthcentury,itmaybe.Hopingtodiscoverwhatlanguageachildwouldspeakifheheardnomothertongue,hetoldthenursestokeepsile
2、nt.Alltheinfantsdiedbeforethefirstyear.Butclearlytherewasmorethanlackoflanguagehere.Whatwasmissingwasgoodmothering.Withoutgoodmothering,inthefirstyearoflifeespecially,thecapacitytosurviveisseriouslyaffected.TodaynosuchseverelackexistsasthatorderedbyFrederick.Nevertheless,so
3、mechildrenarestillbackwardinspeaking.Mostoftenthereasonforthisisthatthemotherisinsensitivetothesignalsoftheinfant,whosebrainisprogrammedtolearnlanguagerapidly.Ifthesesensitiveperiodsareneglected,theidealtimeforacquiringskillspassesandtheymightneverbelearnedsoeasilyagain.Abi
4、rdlearnstosingandtoflyrapidlyattherighttime,buttheprocessisslowandhardoncethecriticalstagehaspassed.Expertssuggestthatspeechstagesarereachedinafixedsequenceandataconstantage,butthereareeaseswherespeechhasstartedlateinachildwhoeventuallyturnsouttobeofhighIQ.Attwelveweeksabab
5、ysmilesandmakesvowel-likesounds;attwelvemonthshecanspeaksimplewordsandunderstandsimplecommands;ateighteenmonthshehasavocabularyofthreetofiftywords.Atthreeheknowsabout1,000wordswhichhecanputintosentences,andatfourhislanguagediffersfromthatofhisparentsinstyleratherthangrammar
6、.Recentevidencesuggeststhataninfantisbornwiththecapacitytospeak.Whatisspecialaboutman'sbrain,comparedwiththatofthemonkey,isthecomplexsystemwhichenablesachildtoconnectthesightandfeel.of,say,atoy-bearwiththesoundpattern"toy-bear".Andevenmoreincredibleistheyoungbrain'sabilityt
7、opickoutanorderinlanguagefromthemixtureofsoundaroundhim,toanalyse,tocombineandrecombinethepartsofalanguageinnewways.Butspeechhastobeinduced,andthisdependsoninteractionbetweenthemotherandthechild,wherethemotherrecognizesthesignalsinthechild'sbabbling,graspingandsmiling,andre
8、spondstothem.Insensitivityofthemothertothesesignalsdullstheinteractionbecausethech
