阅读理解:Oneday,anelectricity(电)generator(发电机)brokedown(坏了).Oneday,anelectricitygeneratorbrokedown.Theelectriclightswentoutalloverthecity.Machinesstoppedworking.Computersfailed.Refrigeratorsnolongerrefrigerated,a

　　阅读理解:Oneday,anelectricity(电)generator(发电机)brokedown(坏了).

　　Oneday,anelectricitygeneratorbrokedown.Theelectriclightswentoutalloverthecity.Machinesstoppedworking.Computersfailed.Refrigeratorsnolongerrefrigerated,andfrozenfoodswentbad.Therewasnoradioandnotelevision.Thesituationwasveryserious.Thelossofpowerwascostingtheelectricitycompanytensofthousandsofdollars.

　　Itwascostingindustryandbusinessinthetownmanymorethousandsofdollars.TechniciansworkednonstopforhourstryingtogetthegeneratortostartagainNothinghappened.Thegeneratorhadafaultthatnooneunderstood.Indespair,themanageroftheelectriccompanysentforaworld-famousexpertongenerators.

　　Afewhourslater,heflewintotown.Hedrovetothepowerstationandwalkedaroundthegenerator.Helookedatitcarefullyandthentookasmallhammeroutofhispocketandhitapartofthegeneratorwithit.Immediately,thegeneratorstartedworkingagain.

　　Theexpertgavehisbilltothemanageroftheelectriccompany.Itsaid:“Forrestarting(重新启动)onegenerator:$10,000.”

　　Themanagerwasveryangry.“Tenthousanddollars!”heexclaimed.“Forhittingthegeneratorwithahammer!It’stoomuchmoney!Iwon’tpayit!”

　　Theexperttookthebillbackandchangeditslightly(稍微).Nowitsaid:“Forhittingonegenerator:$1.Forknowingwheretohit:$9,999.”

　　A.Givethecorrectderivation

　　___1.Allthe(machines)ispoweredelectrically.

　　___2.Peoplecouldnot(foods)theirfamilies.

　　___3.The(costing)toindustrywasthousandsofdollars.

　　___

　　_____4.Nooneinthecityhadthe(technicians)knowtorepairit.

　　_____5.Theexpertlookedatthegeneratorwith(carefully).

　　_____6.Hemadea(slightly)changetothebill.