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1、 2021年 Unit 2Cloning Using Language & Reading单元测试 新人教教版选修8一、单词拼写（共1题）1.1Thenewaircrafthasperformedverywellinits_(最初的)trials.2Threeofthechickens_(孵出)today.3The_(羽毛)ofapigeoncanbringyougoodluck!4Hegavemea_(合理的)explanation.5I_(只是)suggestyoushoulddoitagain.6Sheputsome_(装饰)ontheChristmastree.7Thegrea
2、t_(缺点)tolivingnearamainroadisnoise.8Alittlebabyis_(不能的)towalkortalk.9ItstraditionalinEnglandtoeat_(火鸡)onChristmasDay.10Wetriedin_(徒劳的)topersuadehimtogowithus.二、阅读理解（共2题）1.AteamofMichiganStateUniversity(MSU)researchershasdevelopedanew，moreefficientwayofcloningzebrafish，abreakthroughthatcouldhaveanimp
3、actonresearchintohumanhealth.Zebrafisharequicklybecomingtheanimalofchoiceformanyresearchers.“Aftermice，theyarethemostcommonlyusedvertebrates，thatis，animalswithbackbones，ingeneticstudies，”saysJoseCibelli，theleaderoftheteam.“Theyareusedincancerandheartdiseaseresearchbecausetheyhavemanyofthesamegenesas
4、peoplehave.”Formorethan20years，zebrafishhavealsoservedasanexcellentmodelforunderstandingbothnormaldevelopmentandbirthimperfections.Morerecently，researchwithzebrafishhasextendedtomodelinghumandiseases.Traditionalcloningusesaneggandadonor(捐赠者)cell.TheDNAisremovedfromtheeggandreplacedbytheDNAtakenfromt
5、hedonor.Theresultingfishisanexactgeneticcopyofthedonor.InCibellistechnique，theeggisremovedfromthefemalezebrafishandplacedintheovarian(卵巢的)fluidofaChinooksalmon，anotherkindoffish，beforethedonorcellisplacedintotheegg.Thepreviousmethodsofcloningzebrafishhadverylowsurvivalrates.Withthenewtechnique，thenu
6、mberofclonedfishisincreasedby15percent.Whatmakeszebrafishsousefulinresearchisthattheireggsaretransparent(透明的)，makingthefishsdevelopmenteasytofollow.Improvingzebrafishcloningtechniquesisalsoimportantbecausecurrentlythemouseistheonlygoodmodelforgeneticresearch.“Sofarthemouseistheonlyanimalfromwhichyou
7、candeletegenesinareliableway，”Cibellisays.“Whatresearchersdoismutate(使变异)agene，destroyitsfunctioncompletely，andthenstudytheconsequences.”1.Whatdowelearnaboutzebrafishfromthetext?ATheycanbeusedtocurehumandiseases.BTheyhavebeenusedingeneticstudiesfor20years.CTheyaretheonlyvertebratesusedincloning.DThe
8、irsurvivalratesareincreasedbythenewmethodofcloning.2.Researcherschoosezebrafishforgeneticresearchbecause_.AtheyhavethesamegenesashumanbeingsBtheyareakindofvertebrateCtheirgenescanbechangedDtheireggsareeasytoobserve3.WecaninferthefollowingfromthetextEXCEPTthat_.Athezebrafishcloningtechnologymayprovid
9、eanewmodelforgeneticresearchBmicewillnotbeusedingeneticresearchanymoreCexperimentalresultsonzebrafishmayapplytohumanbeingsDJoseCibelliledthenewresearchofcloningzebrafish4If20zebrafishcouldbeclonedbythepreviousmethod，howmanyzebrafishcanbeclonedbythenewone?A20.B23.C17.D15.5Whatsthetextmainlyabout?AHow
10、cloninghasdeveloped.BAstudyofanewwaytoclonezebrafish.CAbreakthroughinresearchintohumanhealth.DZebrafish，thebestmodelforgeneticresearch.2.Withallthelowfatandfatfreeproductsonthemarket，youdthinkreducingfatintakewouldbethesurestwaytogreaterhealth.Infact，thereissuchathingastoolittlefat.Strangebuttrue：ea
11、tingwithoutfatcanleadtovitamindeficiencies(维生素缺乏症)Thatsbecausesomevitaminsrequirefattobetakenintothebodyandtodotheirjobs，whichincludeprovidingenergy，keepingthebodyworkingnormallyandsupportingthebodytofightagainstdisease，forastart.Vitaminsarenecessary，whichmeansfatsarenecessary，too.Dietaryfat，whichco
12、mesfromthefoodyoueat，iscrucialtotheintakeofthevitaminssoluble(可溶的)infat，whichincludesvitaminsA，D，EandK(VitaminC，neededforhealthyteeth，doesntneedfat)Amongthem，vitaminAisnecessaryforgoodeyesight，andvitaminDforbonehealth.Whenvitaminswhicharesolubleinfataretakenin，theymovefromthemouthtothestomachandthen
13、tothesmallintestine(小肠)Fatscanmoveacrossthecellwalls(细胞壁)ofthesmallintestineandenterthebodysgeneralmovementofblood.Anyvitaminsinthatfataretakenintothebodyaswell.Thevitaminsarethencarriedtotheliver(肝脏)，wheretheyrestoreduntilthebodyneedsthem.Withoutenoughfatinyourdiet，yourbodycannotsuccessfullytakeint
14、hefatsolublevitaminsthatarenecessarytoyourhealth.However，thetypesoffatyoueatmatteralot.Therearesomeimportantrulestofollow，including：avoidunhealthyfatsandplantfatsarebest.Besides，eathealthyoils.Lastbutnotleast，dontoverdoit.Youonlyneedasmallamountoffattohelptakeinvitamins.Justalittlewithanyvitaminrich
15、mealanditllgetthosevitaminsintopositiontodosomegood.6Thefirstparagraphmainlytalksabout_.AwhylowfatproductsarepopularBthebestwaytostayhealthyCtheimportanceofdifferentvitaminsDtheimportantpartthatfatplays7Eatingfatfreemealscanresultintheshortageofvitaminsbecause_.AsomevitaminscanbetakeninwiththehelpoffatBvitaminsaresometimeshard
