Grown-upsareoftensurprisedbyhowwelltheyremembersomethingtheylearnedaschildren buthaveneverpracticed ever since.Aman who hasnothadachancetogoswimming foryearscan stillswimaswellas everwhen hegetsback inthewater.Hecangetonabicycleaftermanyyearsand stillrideaway.Hecanplaycatchandhitaballaswellashisson.Amotherwhohasnotthoughtabout thewordsforyearscanteachherdaughterthepoemthatbegins"Twinkletwinklelittlestar" or rememberthestoryofCinderellaorGoldilocksandtheThreeBears.

Oneexplanationisthelawof overlearning whichcanbestatedasfollows:Oncewehavelearned somethingadditionallearningtrials(尝试) increasethelengthoftimewewillrememberit.

Inchildhoodweusuallycontinuetopracticesuchskillsasswimmingbicycleridingandplaying baseballlongafterwehavelearnedthem.Wecontinuetolistentoandremindourselvesofwordssuch as"Twinkletwinklelittlestar"andchildhoodtalessuchasCinderellaandGoldilocks.Wenotonly learnbutoverlearn.

Themultiplicationtables(乘法口诀表) areanexceptiontothe generalrulethatweforgetratherquicklythethingsthatwelearninschoolbecause they areanotherofthethingsweoverlearnin childhood.

Thelawofoverlearningexplainswhycramming(突击学习)foranexamination thoughitmay resultinapassinggradeisnotasatisfactorywaytolearnacollegecourse.Bycrammingastudent maylearnthesubjectwellenoughtogetbyontheexaminationbutheislikely soonto forgetalmost everythinghelearned. A littleoverlearning ontheotherhandisreallynecessaryforone'sfuture development.

1.WhatthemainideaofParagraph1

A.Peoplerememberwellwhattheylearnedinchildhood.

B.Childrenhaveabettermemorythangrown-ups.

C.Poemreadingisagoodwaytolearnwords.“

D.Storiesforchildrenareeasytoremember.

2.Theauthorexplainsthelawofoverlearningby

A.presentingresearchfindings

B.settingdowngeneralr