选修7Unit 21 Human Biologydoc.docx
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选修7Unit 21 Human Biologydoc.docx
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选修7:
Unit21HumanBiology
课堂作业
Ⅰ.单句语法填空
1.Itwasanunpopulardecisiontopostpone________(build)thenewschool.
2.Iamverymuchopposedto________(permit)himtogoalone.
3.Itismyfinancesthatprohibitmy________(go)tocollege.
4.Itisnecessary________ustoexaminethepapersbeforehandingthemin.
5.Youratherthananyoneelse________(be)toblameforthemistake.
6.Heissaid________(study)intheUSnow.
7.IfBob________(come)hereyesterday,hecouldhaveseenJackieChan.
8.It’sclever________you________(work)outthemathprobleminsuchashorttime.
9.Nobodycantolerate________(cheat),andthat’swhyhehasnofriend.
10.________(equip)withnewscientificfarmingmethods,theyhavebeenabletouselessfarmlandthaninthepast.
答案 1.building 2.permitting 3.going 4.for5.are 6.tobestudying 7.hadcome 8.of;towork 9.beingcheated 10.Equipped
Ⅱ.单句改错
1.Itisniceforyoutogiveussomuchhelp.
2.Strangely,Mr.Green,opposingtothenewpolicy,madenoremarkinthediscussion.
3.Ialwayshavefaithhewillcometoourpartyinperson.
4.Mydeskmate,ratherthanyou,areresponsibleforthework.
5.Hemadefortuneinhisbusinesstradelastyear.
6.Thankfully,thisisadiseasethatisnowinthedecline.
7.Theyareurgentlyseekingoutthepostswheretheyarewellpaid.
8.Nomatterhowhardthesituationis,youshouldnotloseyourheart.
答案 1.for→of 2.opposing→opposed 3.faith后加that 4.are→is 5.made后加a 6.in→on 7.out→after/for 8.去掉your
Ⅲ.课文缩写语法填空
TheOlympicspirithasbeenviolatedbythedesiretosucceed1.________allcosts.Nowrecords2.________(fall)intrackandfieldduetobetterequipment,traininganddietsincethefirstOlympicGames.Butwecameacrosstheissueofperformance-enhancingdrugs,3.________isknownasdoping.Someathleteswhoabusethedrugsrisk4.________(face)serioushealthproblemsinlaterlife.Theyseek5.________(achieve)beyondtheirnaturallimits.Itiscompulsoryforwinners6.________(test)butotherparticipantsareonlytestedatrandom.What’s7.________(much),“gene-therapy”willbethenextbigthreat.Inthefuture,athleteswhohavetheirgenes8.________(change)mightbeabletodobetter9.________theyshouldbe.So10.________dopingandgene-therapycontinuetoaffecttheoutcomesofmajorsportingevents,theword“hero”willhavelostallmeaning.
答案 1.at 2.havefallen 3.which 4.facing 5.toachieve 6.tobetested 7.more 8.changed 9.than 10.if
Ⅳ.单元考点作文串记
一、根据提示翻译句子
1.据说昨日三名强盗抢劫了一家银行的一笔巨款。
(Itbesaidthat...,rob...of...)
____________________________________________________________
2.警方迅速封锁(block)主要道路,并禁止可疑车辆通行。
(prohibit...from...)
____________________________________________________________
3.对这样的犯罪行为,警方必须不惜任何代价清除。
(wipeout,atallcosts)
____________________________________________________________
4.警察正在搜寻有关信息。
(seek)
____________________________________________________________
答案 1.Itwassaidthatthreerobbershadrobbedabankofalargefortuneyesterday.
2.Thepoliceimmediatelyblockedthemainroadsandprohibitedthesuspectcarsfrompassing.
3.Thepolicemustwipeoutthematallcostsasforsuchcrimes.
4.Thepoliceareseekingtheinformation.
二、加入适当过渡词,连句成篇
【参考范文】
Itwassaidthatthreerobbershadrobbedabankofalargefortuneyesterday.Therefore,thepoliceimmediatelyblockedthemainroadsandprohibitedthesuspectcarsfrompassing.Thepolicemustwipeoutthematallcostsasforsuchcrimes.Atpresent,thepoliceareseekingtheinformation.
课下作业
A卷 阅读提速练(限时20′)
Ⅰ.阅读理解
A
Americansspendmorethan$20billionayearonsupplements(营养品)inthehopeofpreventingcancer,heartdiseaseanddementia(痴呆).However,anewstudyshowstheyprovidenobenefitandtheymayevenbedangerousforpeople.
Researcherssaypeoplehavespenttoomuchmoneyonpillsthatbringnobenefit,andinsomecasesmayevenbeharmful.What’sworse,somecompaniesevencasuallystatethattheirproductscanhaveapositiveeffectonsomekindsofdiseases.
EnoughisEnough
Aninternationalteamofresearchersconductedthreedifferentstudies.Thefirstwasastudythatlookedattheconsumptionofadailymultivitamin(复合维生素)topreventdiseaseandcancerinmorethan450,000participants.Thesepillshadnoobviouseffectondeath.Thesecondstudylookedintotheeffectofadailymultivitaminafteraheartattackinabout1,700menandwomenoveranaverageoffiveyears.Noadvantagecouldbefound.Thethirdstudylookedintotheuseofamultivitamintopreventdementiainnearly6,000menaged65orolder.Again,nothing.
“Thesevitaminpillsshouldnotbeusedfordiseaseprevention.Enoughisenough,”saidresearchers.
DangeroustoYourHealth
Ifthatwasn’tbadenough,researchersalsofoundthatvitaminE,whentakeninlargedoses(剂量),canbeharmful.Surprisingly,smokerswhotooksomesupplementswereatanincreasedriskofdevelopingcancer.Besides,toomanyvitaminpillscandoharmtopeople.
Insteadoftakinginvitaminsandminerals,expertssuggestthatpeopleshouldeatfruitsandvegetables,reducefatandsaltandtakeexercise.
【语篇解读】 本文是说明文,题材为日常生活类。
很多人觉得维生素可以补充营养,长期服用还能预防疾病。
研究表明,吃营养品对健康无效,吃多了还有害。
1.What’sthebesttitleforthetext?
A.Vitaminsandmineralsareawasteofmoney
B.Americansdislikeeatingfruitsandvegetables
C.Threestudiesonsupplementsonsale
D.Americansvaluehealthmore
答案 A [主旨大意题。
本文主要讲研究表明,吃营养品对健康无效,吃多了还有害,所以花钱买营养品是一种浪费。
]
2.Whatcanwelearnfromthefirsttwoparagraphs?
A.Thegovernmentshouldpunishsomecompanies.
B.Americansareunlikelytosufferheartattacks.
C.Peopleknowtheyhavebeencheated.
D.Peopleshouldstoptakingthesepills.
答案 D [推理判断题。
根据文章第一段theymayevenbedangerousforpeople和第二段Researcherssaypeoplehavespenttoomuchmoneyonpillsthatbringnobenefit,andinsomecasesmayevenbeharmful可知,吃营养品对健康无效,吃多了还有害。
]
3.TheauthormentionsvitaminEto________.
A.warnsmokersagainstvitaminE
B.showvitaminEdoesharmtohealth
C.persuadereaderstogiveupvitaminE
D.proveblindlytakinginvitaminEisdangerous
答案 D [细节理解题。
根据文章倒数第二段Ifthatwasn’tbadenough,researchersalsofoundthatvitaminE,whentakeninlargedoses,canbeharmful可知,研究人员发现,大剂量服用维生素E对身体有害。
]
4.Thetextmaybeselectedfrom________.
A.astorybookB.amedicaljournal
C.anagriculturalmagazineD.anengineeringtextbook
答案 B [推理判断题。
这篇文章主要讲过多摄入营养品对身体健康不利,这和医学有关,故这篇文章可能选自医学杂志。
]
B
“TheManwiththeGoldenArm”maysoundlikethenameofsomesuperheroinacomicbook.Butthisnamebelongsto78-year-oldJamesHarrison—anAustralianmanwhohasdonatedbloodalmosteveryweek,savingmorethan2millionbabiesintheprocess.
HarrisontoldCNN,anAmericanchannel,aboutwhyhechoosestodonate,eventhoughit’snotthemostpleasurableexperience:
“NeveroncehaveIwatchedtheneedlegoinmyarm.Ican’tstandthesightofblood,andIcan’tstandpain.”
Anamazinglyuniqueantibody(抗体)inHarrison’sbloodmakesitatruelifesaverforbabieswhocouldbeaffectedbyrhesusdisease.
Theconditionoccursduringsomepregnancies,whenawomanwhohasrhesus-negativebloodproducesantibodiesthatdestroyherbabies’cells.Thiscanhappenwhenthebabyhasthesamerhesus-positivebloodasthefather.Rhesusdiseasecancausehealthissuesinbabies.Itcanevenresultindeath.
Harrison’sbloodhelpedphysiciansdevelopaninjectioncalledAnti-Dinthe1960s,whichpreventswomenwhohaverhesus-negativebloodfromdevelopingtheharmfulantibodieswhilepregnant.AfterHarrisoncompletesoneofhisroutinedonations,hisbloodcanbeusedtocreatemorevaccines(疫苗).
“Istarteddonatingin1955,twodaysafterIturned18,”Harrisonsaidwhenhecompletedhis1,075thdonation.
AsCNNreported,everyAnti-DvaccinecreatedinAustraliahassomethingtodowithadonationfromHarrison,whoholdstherecordformostblooddonationsinAustralia.
“Anumberofmothershavecomeuptomeandsaid,‘Thankyouverymuchforwhatyou’vedone,becauseInowhaveone,two,threehealthychildren,’”Harrisonsaid.
Harrison’sowndaughter,TraceyMellowship,hadbeenoneofthe17percentofwomenwhoneedAnti-Dduringtheirpregnancy.Theinjectionhelpedguaranteehersecondsonwouldbebornhealthy.
“Dadhadalwaysdonated—weknewthat,”Mellowshipsaid.“Butitdidn’thithomeuntilIwaspregnantandknewtheconsequences.”
【语篇解读】 本文是记叙文。
澳大利亚一位老翁的血液中含有罕见的溶血性疾病抗体,他从18岁开始每周献血,至今已坚持了约60年,拯救了两百多万婴儿的性命。
5.FromthefirsttwoparagraphswecaninferthatHarrisonis________.
A.humorousandsmartB.braveandunselfish
C.friendlybutnervousD.optimisticbutweak
答案 B [推理判断题。
根据第一段中的whohasdonatedbloodalmosteveryweek,savingmorethan2millionbabiesintheprocess可知,Harrison坚持每周献血,拯救了两百多万婴儿的性命,由此可以看出,他很无私;根据第二段中的NeveroncehaveIwatchedtheneedlegoinmyarm.Ican’tstandthesightofblood,andIcan’tstandpain可知,Harrison既晕血又怕疼,但他还敢献血,说明他很勇敢。
]
6.Babiesaffectedbyrhesusdisease________.
A.havethesamebloodtypeastheirmothers
B.developthediseaseafterbeingborn
C.can’tformbloodthemselves
D.growproblematiccells
答案 D [细节理解题。
根据第四段中的...whenawomanwhohasrhesus-negativebloodproducesantibodiesthatdestroyherbabies’cells可知,当溶血性疾病发生时,母亲血液中的抗体会进入胎儿体内破坏胎儿的细胞,导致胎儿出生后有些细胞有缺陷。
]
7.Harrison’sbloodcan________.
A.helppatientsdevelopAnti-D
B.avoidtheriskofrhesusdisease
C.curerhesusdiseaseaffectedbabies
D.stopbabiesfromproducingantibodies
答案 B [细节理解题。
根据第五段中的Harrison’sbloodhelpedphysiciansdevelopaninjectioncalledAnti-Dinthe1960s,whichpreventswomenwhohaverhesus-negativebloodfromdevelopingtheharmfulantibod
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