北师大版高三英语课后习题含答案限时规范练46选修8Unit23BWord文档下载推荐.docx
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北师大版高三英语课后习题含答案限时规范练46选修8Unit23BWord文档下载推荐.docx
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A
Whatdoyouusuallydowhenaflyinginsectlandsonyourarm?
Mostlikelyyoublowitaway.Butwhatifthatbugwerealadybug(瓢虫)?
Thenchancesareyouwouldletitstay.Whatisitaboutladybugsthatwelike?
Farmersoncethoughtladybugswereagoodlucksign.Aladybuginthefieldmeantthatthecropswouldbesuccessfulandtheweatherwouldbegood.Thefarmersmayhavebeenexaggerating(夸大)aboutwhataverysmallbugcando,butinfactladybugsdohelpoutwiththecrops.Theyeatharmfulinsects.
Actually,itisnottheadultladybugthateatstheotherinsects.It’stheladybuglarvae(幼虫).Ladybugslaytheireggsonleavesthatarecoveredwithaphidsorotherinsects.Whenthelarvaecomeoutoftheeggs,theyareveryhungryandwilleatmites,aphids,mealybugs,greenflies,andothercrop-destroyers.
Asingleladybuglarvacaneatover1,000aphidsinoneday.Inthe1800s,ladybugswerebroughtallthewayfromAustraliatoCaliforniaandsetfreeamongorangetreesthatweredyingfrombeingeatenbyinsects.Thelittleredandblack“eatingmachines”completelysavedallthetrees.
Ladybugsgoabouttheirdailybusinesswithoutworryingmuchaboutanything.Veryfewbirdsorinsectswilleataladybugbecauseitgivesoffsomethingthatisdangeroustoeat.Ladybugsalsoprotectthemselvesbyplayingdead.Theyfalloffleavesandremainverystilluntiltheirenemygoesaway.
Sonexttimeyouseealadybug,thinkaboutwhatitmaybeupto.Maybeitisofftosaveanorangetree.Maybeitsnextmovewillbetofalloffaleafandplaydeadorstanduptoabirdabout100timesitssize.Maybeit’slettingyouknowthattheweatherwillbegoodtomorrow.Whoknows?
Ladybugsarespecialthatway.
【篇章导读】本文是说明文。
文章是对瓢虫的先容。
瓢虫是一种可以吃害虫的虫豸,它们对于庄稼来说是得力的助手。
1.Whatdoweknowaboutmitesandaphids?
A.Theydoharmtothecrops.
B.Theyeatmorethantheyshould.
C.Theyarefoodforadultladybugs.
D.Theyaretheenemyofladybuglarvae.
答案A
剖析推理判断题。
由第三段中的“theyareveryhungryandwilleatmites,aphids,mealybugs,greenflies,andothercrop-destroyers”可知,这些都是对庄稼有害的虫子。
2.WhywereladybugsbroughtfromAustraliatoCaliforniainthe1800s?
A.Tosaveorangetrees.
B.Todoresearchonthem.
C.Toincreasetheirnumber.
D.Toreporttheweatherforfarmers.
剖析细节明白题。
由第四段中的“ladybugswerebrought...setfreeamongorangetreesthatweredyingfrombeingeatenbyinsects”可知,19世纪瓢虫被从澳大利亚引进到美国加利福尼亚州是为了挽救被害虫陵犯的橘子树。
3.Whatdoestheunderlinedpart“standupto”inthelastparagraphprobablymean?
A.Playwith.
B.Worryabout.
C.Getalongwith.
D.Fightbackagainst.
答案D
剖析词义预测题。
由倒数第二段中的“Veryfewbirdsorinsectswilleataladybugbecauseitgivesoffsomethingthatisdangeroustoeat.”可知,很少有鸟或虫豸吃瓢虫。
再由画线部分后的“abirdabout100timesitssize”可知,当遇见比它大的鸟时,瓢虫会释放某种物质从而对鸟造成威胁。
故此处的standupto有“回击,抵御”之意。
4.Whatdoestheauthorthinkoftheladybug?
A.Itisacrop-destroyer.
B.Itisagoodlucksign.
C.Itisalittleflyinghelper.
D.Itisabigeatingmachine.
答案C
本文旨在介绍瓢虫这种可以吃害虫的虫豸,它们对于庄稼来说是得力的助手,故C项中的helper最切合瓢虫的这一特性。
B
Twobookshavebeendevelopedtohelpdesigners,developersandhomeownersmakeiteasierandsaferfortheblindtofindtheirwayto,intoandthroughbuildingsandlargepublicspaces.
ThebookswerecreatedbytheCooperativeResearchCentreforConstructionInnovation(建筑创新),aprogrammewhichhelpssolvetheproblemoffindingwaysaroundbuildingsandpublicspaces.
ConstructionInnovationCEOKeithHampsonsaysanywayfindingsystemismorethanjustsigns.“Itincludesbuildings,insidedesignandlighting,”Keithsays.Hesayspeoplehavingproblemswiththeireyesightusethesecommunicativesignstomakemovingaroundspaceseasier.Forexample,agoodsignmayincludetactile(可感触到的)lettering—Brailleandatactilegroundsurface.
Theprojectwonthe2007DisabilityActionWeekAwardforBuildingAccessibleHousingandEnvironments.“Theprojecthasreceivedincreasednationalattentionsincetheawardlastyear,”Keithsays.“Mostimportantlyhowever,wehavehelpedtoraisetheawarenessandneedforawayfindingsystemacrossthebuildingandconstructionindustry.”
TheDepartmentofPublicWorkswasakeymemberintheproject.TeamleaderRonApeltsayspeoplewitheyesightproblemsareoftenforgottenintheplanninganddesignofbuildingsandpublicopenspaces.
“Ourbooksaremainlyfornewbuildingsandtheimmediatespacessurroundingthesebuildings,”Ronsays.“However,thebookscanalsobeusedforanyplansforoldbuildingsandimprovingwayfindingaroundplacessuchasuniversities,hospitalsandschools.”
“Theycanalsobeusedinbusyspaceslikeshoppingcentresasthedesignideasremainunchangednomatterwhatthespacesandplacesarelike.”
文章介绍了一项帮助盲人识别道路、进出大楼和公开场合等的项目。
5.Whatarethebooksmentionedinthetextabout?
A.How
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