高三复习：英语阅读理解练习（12）

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1、高三复习：英语阅读理解练习（12）　　Whenweseewell,wedonotthinkaboutoureyesveryoften.Itisonlywhenwecannotseeperfectlythatwerealizehowimportantoureyesare.　　Peoplewhoarenear-sightedcanonlyseethingsthatareveryclosetotheireyes,Everythingelseseemsblurry。Manypeoplewhodoalotofwork,suchaswriting,readingandsewingb

2、ecomenear—sighted.Then　　Peoplewhoarefar-sightedsufferfromjusttheoppositeproblem.Theycanseethingsthatarefaraway,buttheyhavedifficultyinreadingabookunlesstheyholditatarm’slength.Iftheywanttodomuchreading,theymustgetglasses,too.　　Otherpeopledonotseeclearlybecausetheireyesarenotexactlytherig

3、htshape.Theyhavewhatiscalledastigmatism.This,too,canbecorrectedbyglasses.Somepeople’seyesbecomecloudybecauseofcataracts.Longagothesepeopleoftenbecameblind.Now,however,itispossibletooperateonthecataractsandremovethem.　　Havingtwogoodeyesisimportantforjudgingdistances.Eacheyeseesthingsfroma

4、slightlydifferentangle。Toprovethistoyourself,lookatanobjectourofoneeye;thenlookatthesameobjectoutofyourothereye.Youwillfindtheobject’srelationtothebackgroundandotherthingsaroundithaschanged.Thedifferencebetweenthesetwodifferenteyeviewshelpsustojudgehowfarawayanobjectis.Peoplewhohaveonlyo

5、neeyecannotjudgedistanceaspeoplewithtwoeyes.　　1.Weshouldtakegoodcareofoureyes.　　A.onlywhenwecanseewell　　B.onlywhenwecannotseeperfectly　　C.evenifwecanseewell　　D.onlywhenwerealizehowimportantoureyesare　　2.Whenthingsfarawayseemindistinct,oneisprobably.　　A.near-sightedB.far-sighted　　C.astigm

6、aticD.sufferingfromcataracts　　3.Theunderlinedwordsufferinthethirdparagraphprobablymeans.　　A.experienceB.imagine　　C.feelpainD.areaffectedwith　　4.Havingtwoeyesinsteadofoneisparticularlyusefulfor.　　A.seeingatnightB.seeingobjectsfaraway　　C.lookingoverawideareaD.judgingdistances　　5.Peoplewhos

7、ufferfromastigmatismhave.　　A.oneeyebiggerthantheother　　B.eyesthatarenotexactlytherightshape　　C.adifficultythatcanbecorrectedbyanoperation　　D.aneyedifficultythatcannotbecorrectedbyglasses