七选五练习题

七选五练习题29．________Scientistsandexpertshaveprovedtheuniquenessoffingerprintsanddiscoveredthatnoexactlysimilarpatternispassedonfromparentstochildren,thoughnobodyknowswhythisisthecase.Theridge(隆起)structureonaperson'sfingersdoesnotchangewithgrowthandisnotaffectedbysurfaceinjuries.Burns,cutsandotherdamagetotheouterpartoftheskinwillbereplacedintimebyanewone,whichbearsareproductionoftheoriginalpattern.30.________Somecriminalsmakeuseofthisfacttoremovetheirownfingerprintsbutthisisadangerousandraresteptotake.Fingerprintscanbemadeveryeasilywiththeprinter'sink.Theycanberecordedeasily.31.________Becauseofthesimplicityandeconomyofthissystem,fingerprintshaveoftenbeenusedasamethodofsolvingthecriminalcase.Asuspectedmanmaydenyachargebutthismaybeinvain.32.________Whenasuspectleavesfingerprintsbehindatthesceneofacrime,theyaredifficulttodetectwiththenakedeye.33.________Someofthemarksfoundareincompletebutidentificationispossibleifaprintofaquarterofaninchsquarecanbeobtained.A．Specialtechniquesareusedto“develop”them.B．Afingerprintisanimpressionoftheridgestructure.C．Itisonlywhentheinnerskinisinjuredthatthearrangementwillbedestroyed.D．Withspecialmethods,identificationcanbeachievedsuccessfullywithinashorttime.E．Somecriminalsmayleavetheirfingerprintsatthesceneofacrime.F．Hisfingerprintscanprovewhoheisevenifhisappearancehasbeenchangedbyageoraccident.G．Everyhumanbeinghasauniquearrangementoftheskinonhisfingersandthisarrangementisunchangeable.【答案】29.G30.C31.D32.F33.ASomesimplekeystotransformyourlifeThepowerofchoices.Everyoneofusmakescountlesschoiceseveryday.Everychoicewemakehasanimpactonourlives.16.________Whenhungerstrikes,wecanreachforahealthy,nutritioussnack,orwecanchoosethesugarhighofjunkfood.Themoreimportantthedecision,thegreateritseffect.Forinstance,howdoIacttowardsthatpersonwhotreatedmebadly?DoIgenerallychoosetobepassive，ordoIactivelysetclearintentionsandcreatewhatIwantinmylife?Everychoicewemake,howeverbigorsmall,affectsusinsomeway.17．________Ifyouareinterestedinlivingaricher,fullerlife,thereisafoundationuponwhichyoucanbaseallofyourdecisionswhichcanmakelifebetternotonlyforyou,butalsoforthosearoundyou.Thisfoundationistochoosebasedonwhat'sbestforall.Imagineaworldwhereeveryparent,friend,teacher,businessperson,andpoliticiantrulydidtheirbesttochoosewhat'sthebestforallinvolvedineverydecisiontheymade.Wewouldcertainlyliveinamorecaring,supportiveworld.It'stheintention.18．________Theanswerissimple.Itdoesn'tmatter.Thematteritselfisnotthechoiceyoumake,butrathertheintentionbehindyourchoice.Thekeyisthatwhatdecisionyoumake.Youareclearinyourintentionofchoosingbasedonwhat'sthebestforall.Ifitlaterturnsoutthatyouseemtohavemadeabadchoice,there'snoneedforguilt.Knowingthatyoudidyourbesttochoosewithasinceredesireforwhat'sthebestforall,yourconsciencestaysclearandopen.19.________What'sthebestforme,too?Choosingwhat'sthebestdoesnotmeanyouhavetoalwayssacrificeyourselfforothers.Anotherexample,averyexhaustedmothercanlosehertempereasilyandthenshemaybecomeillsothatshecan'tsupportherfamilywithoutearninganymoney.20.________Soaswemovethrougheachdayofourlives,letuslearntocareaboutourselvesaswedoourbesttochoosewhat'sthebestforothers.A．Howdoyoumakechoices?B．Discussthemtogethertochooseyourproject.C．ButhowdoIknowwhatisreallythebest?D．Whatisimportantisthatweshouldpayattentiontothispresence.E．Soitisveryimportantforyoutotakegoodcareofyourself.F．Evensmallorunimportantchoicescanaffectwhatweexperienceandhowwefeel.G．Thisthenallowsyoutoimproveyourdecision,andmakearightone.【答案】16.F17.A18.C19.G20.EDon'tyoujustloveiceskatingeverywinter?Iamsurethatsincewinterisapproaching,yourskatesaresettocomeout,justwaitingtobeused.Impressyourfriendswithyournewtricksonhowtoice－skatebackwardswiththehelpofthesetips.StandstraightThefirstthingthatyouneedtodois,standstraight.26.________，ifyoufeelthatyouarefallingbackwards.Don'tworry，andthishappenstoall.ConfidenceiswhatyouneedThemostimportantstepwhilelearninghowtoskatebackwards,ishavingenoughconfidenceinyourselfandinwhatyouaredoing.Howcanyouachievethis?Bypractice.Oneoftheimportanticeskatingtipsandtechniquesisthatifyoufeelthatyouarelosingyourbalance,thenscissor(做剪式运动)yourskates.27.________．MaintainspeedTryskating(滑)withoneskatewhilerollinginastraightlinewiththeother.28.________.Nowbringtheskatewhichyouareusingtoscull,andthenagain,repeatthesameprocess.Makesurethatyouputmostofyourweightontheskatewhichismovingstraightandnottheonewithwhichyouaresculling.Now,trythesamethingusingtheotherfoot.29．________Onceyouareconfidentthatyoucanscullwitheitherfoot,thenextthingthatyouhavetodoisincreaseyourspeed.Trysomeofyourowntricksnow.Scullwitheitherfootorwithbothatthesametime.ScullandbeawareWhileyoukeeponefootstraight,keepscullingwiththeother.Youcandothatwithbothfeetatthesametime.30.__________，butdon'tgetsoinvolvedthatyoudon'tseewhereyouaregoing.Ifyouarenotwatchingyourback,youmightjustbangagainstsomethingorsomeone.A．Thatis,keeppushingyourselfbackwardwithanoutwardstroke(滑动)B．Whilegoingbackwards,justgetusedtothefeelingofmovingbackwardsC．Keeppractisingthistillyouareconfidentab