北师大版高三英语课后习题含答案限时规范练46选修8Unit23B.docx

北师大版高三英语课后习题含答案限时规范练46选修8Unit23B.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8Unit23B

限时规范练46（选修8　Unit23B）

核心素养关键词:

培养学生人与自然、保护动物的思维意识

　限时规范练第92页　 

一、阅读理解

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.

答案A

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

剖析推理判断题。

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.”

【篇章导读】本文是说明文。

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