Grown-upsareoftensurprisedbyhowwelltheyremembersomethingtheylearnedaschildrenbuthaveneverpracticedstillswimaswellasevereversince.Amanwhenhegetsbackwhohasnothadachancetogoswimmingforyearscaninthew

　　Grown-upsareoftensurprisedbyhowwelltheyremembersomethingtheylearnedaschildrenbuthaveneverpracticedstillswimaswellasevereversince.Amanwhenhegetsbackwhohasnothadachancetogoswimmingforyearscaninthewater.Hecangetonabicycleaftermanyyearsandstillrideaway.Hecanplaycatchandhitaballaswellashisson.Amotherwhohasnotthoughtaboutthewordsforyearscanteachherdaughterthepoemthatbegins"Twinkletwinklelittlestar"。rememberthestoryofCinderellaorGoldilocksandtheThreeBears.

　　Oneexplanationisthelawofoverlearningwhichcanbestatedasfollows:Oncewehavelearnedsomethingadditionallearningtrials(尝试)increasethelengthoftimewewillrememberit.

　　Inchildhoodweusuallycontinuetopracticesuchskillsasswimmingbicycleridingandplayingbaseballlongafterwehavelearnedthem.Wecontinuetolistentoandremindourselvesofwordssuchas"Twinkletwinklelittlestar"andchildhoodtalessuchasCinderellaandGoldilocks.Wenotonlylearnbutoverleam.

　　Themultinlicatinntables(乘法口诀表)areanexcentiontothegeneralrulethatweforgetratherquicklythethingsthatwelearninschoolbecausetheyareanotherofthethingsweoverlearninchildhood.

　　Thelawofoverleamingexplainswhycramming(突击学习)foranexamination.thoughitmayresultinapassinggradeisnotasatisfactorywaytolearnacollegecourse.Bycrammingastudentmaylearnthesubjectwellenoughtogetbyontheexaminationbutheislikelysoontoforgetalmosteverythinghelearned.Alittleoverlearning.ontheotherhandisreallynecessaryforone'sfuturedevelopment.

　　1.WhatisthemainideaofparagraphI?

　　A.Peoplerememberwellwhattheylearnedinchildhood.

　　B.Childrenhaveabettermemorythangrown-ups.

　　C.Poemreadingisagoodwaytolearnwords.

　　D.Storiesforchildrenarceasytoremember.

　　2.Theauthorexplainsthelawofoverleamingby_________.

　　A.presentingresearchfindings

　　B.sellingdowngeneralrules

　　C.makingacomparison

　　D.usingexamples

　　3.Accordingtotheauthorbeingabletousemultiplicationtablesis_______.

　　A.aresultofoverlearning

　　B.aspecialcaseofcramming