人教版九年级英语Unit8第4课时SectionB 3a—Self Check课件.ppt

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人教版九年级英语Unit8第4课时SectionB 3a—Self Check课件.ppt

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第4课时SectionB3a—SelfCheckUnit8ItmustbelongtoCarla.

Ⅰ阅读理解(跨学科·生物)(2023广东中考改编,56—60,★★☆)Someanimalscaneasilyfindtheirwayhomeafteralongjourney.Howdotheymakeit?Scientificresearchshowsthattheyarebornwithcertainunusualabilitiesfordirection.Acertainkindofant,forexample,cancountthestepstoavoidgettinglost.Theycangoasfaras110metresandbring

基础过关全练

foodhome.Theseantsliveintheopendesert(沙漠),sotheyhave

nothingtoguidethemalongtheway.It’slikesomeonewalkingsixkilometresthroughadarkforest.Somefishhaveanunbelievablesenseofsmell.Theycansmellevenasingledropoftheirhomewaterinalargeseaarea.Someseabirdshaveasimilarability.Theyareabletomakeasmellmapoftheirflyingarea.Someanimalscansensetheearth’smagneticfield(磁场),

whilehumanscan’t.Thismagneticfieldguidesacertainkind

offishwhentheyswimalongwaytoaplaceandthenback.

Howcanthiskindoffishdothat?Itisstillamystery.Scien-tistshavenogoodanswersyet.However,animalswithsuchunusualabilitiesstillhavedifficultydealingwithenvironmentalchangescausedbyhumanact-ivities.Forexample,manybirdsdependonstarsfordirection,buttheygetlosteasilyatnightwhencitylightsarekeptonall

night.Tosolvethisproblem,wecansimplyturnoffsomelightsatnight.Clearly,onesmallactofhumansmaymeanalottoan-imals.

1.Whereisthispassagemostprobablyfrom?A.Astorybook.B.Anartmagazine.C.Aguidebook.D.Asciencemagazine.2.Howcanacertainkindofantfindtheirway?A.Byimaginingtheway.B.Bycountingthesteps.C.Bybringingfoodtogether.D.Bywalkingthroughaforest.DB

3.Whatdoestheunderlinedword“mystery”inParagraph4

probablymean?A.Secret.B.Choice. C.Reason.D.Feeling.4.Whatarepeopleadvisedtodoaccordingtothelastpara-

graph?A.Tohelpanimals.B.Totravelatnight.C.Tokeepcitylightson.D.Todevelop