阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。【宁夏银川市唐徕回民中学2014试题】AAn80-year-oldmanwassittingonthesofainhishousealongwithhis45-year-oldhighlyeducatedson.Suddenlyacrow（乌鸦）perchedonthetreeneartheirwindow.Thefatheraskedhisson,“Whatisthis?”Thesonreplied,“Itisacrow.”Afterafewminutes,thefatheraskedhissonthe2ndtime,“Whatisthis?”Thesonsaid,“Father,IhavejustnowtoldyouIt’sacrow’.”Afteralittlewhile,theoldfatheragainaskedhissonthe3rdtime,“Whatisthis?”“It’sacrow,acrow,acrow.”saidthesonloudly.Alittleafter,thefatheragainaskedhissonthe4thtime,“Whatisthis?”Thistimethesonshoutedathisfather,“Whydoyoukeepaskingmethesamequestionagainandagain?‘ITISACROW’.Areyounotabletounderstandthis?”Alittlelaterthefatherwenttohisroomandcamebackwithanolddiary,whichhehadkeptsincehissonwasborn.Onopeningapage,heaskedhissontoreadthatpage.Whenthesonreadit,thefollowingwordswerewritteninthediary:“Todaymylittlesonagedthreewassittingwithmeonthesofawhenacrowwassittingonthewindow.Mysonaskedme23timeswhatitwas,andIrepliedtohimall23timesthatitwasacrow.Ihuggedhimlovinglyeachtimeheaskedmethesamequestionagainandagainfor23times.Ididnotatallfeelannoyed;Iratherfeltaffectionformyinnocentchild.”21.InwhattonedidthesonsaytohisFather“It’sacrow,acrow,acrow.”?A.impatientB.excitedC.hurriedD.surprised22.WhydidtheFatheraskthesamequestionagainandagain?A.Becausehewantedtomakehissonangry.B.Becausehewastoooldtorememberanything.C.Becausehecouldn'tunderstandwhathissonsaid.D.Becausehewantedtoseehowpatienthissonwouldbe.23.Howoldwastheoldmanwhenhissonaskedhim23times“Whatisthis”?A.35yearsold.B.38yearsold.C.45yearsold.D.80yearsold.24.Whatisthemostsuitabletitleforthepassage?A.Acrow.B.Father'slove.C.Anolddairy.D.Anoldman.【参考答案】ADBBATemperatureismeasuredbymeansofathermometer(温度计).Onegeneralformofthermometerdependsuponthefactthatmostsolidsandliquidsexpandastheirtemperaturerises.Thereareoneortwoexceptions.Thereis,forinstance,akindofsteelcalledinvar(from“invariable”)whichdoesnotchangeitsdimensionsastemperaturechanges;itisvaluableformakingpendulums(钟摆),since,ifthelengthofapendulumchanges,itstimeofvibrationchanges.Itisalsousedformakingveryaccuratemeasuringscales.Inbothcases,then,changesofatmospherictemperaturehavenoeffectifinvarisused.Anotherexceptionisthatveryoddliquid,water,whichhasmanystrangeproperties(特性).Aswatergetscolderitcontracts(收缩),whichisordinarybehavior,untilitreachesthetemperatureof30℃.abovefreezingpoint.Afterthat,asitgetscolder,itexpands.Thisisfortunate---forconsideringthefreezingofapond.Asthewaterontopgetscolder,itshrinks;andso,volumeforvolume,itbecomesheavierandsinks.Thisgoesonuntilallthepondisat30℃,butafterthat,asthewaterbecomescolderitexpands.Thereforethecolderwaterstaysontopandfreezes,coveringthepondwithice.Ifthewaterwentoncontractingdowntothefreezingpoint,thepondwouldbecomeasolidblockoficeintheend.Thiswouldnotworrypeoplewholiveinhotclimates,butitwouldbeveryseriousforthosewholiveincoldclimates,especiallyforthosewhowanttobreaktheiceandcatchfishwhichliveinthecoldwaterbeneath.1.Invarisvaluableformakingpendulumsbecause_______.A.itcanhardlychangeitsshapeorsizeastemperaturechanges.B.itwillchangeitsdimensionswithoutthechangeoftemperature.C.itstimeofvibrationdoesn’tchangeifitslengthchanges.D.itstimeofvibrationdoesnotchangeifitslengthcha...
