2019中考英语二轮复习阅读理解优编（五）.docx

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1、2019中考英语阅读理解优编（五）【实战训练】A（2019中考保健与健康类选练）Spendingtwoorthreehoursplayingoutdoorseachdaycanreducethechanceofbecomingshort-sighted,aresearchshows.Itchallengesthebelief(信念)thatshort-sightednessiscausedbycomputeruse,watchingTVorreadinginweaklight.TheAustraliangovernmentrese

2、archersbelievethatthesunlightisgoodforpeople’seyes.Theycomparedthevision(视力)andhabitsof100seven-year-oldchildreninSingaporeandAustralia.Inall,30%oftheSingaporeanchildrenwereshort-sighted—thisrate(比率)wastentimeshigherthanAustralianchildren.Bothgroupsspendasimilaramount

3、(数量)oftimereading,watchingtelevisionandplayingcomputergames.HowevertheSingaporeanchildrenspentanaverage(平均)ofonlyhalfanhouradayoutdoors—90minuteslessthantheAustralianchildren.ProfessorIanMorgan,fromtheAustralianResearchCouncil’svisionCentre,said,“Humansarenaturallylon

4、g-sighted,butwhenpeoplebegintogotoschoolandspendlittleornotimeoutdoors,thenumberofshort-sightedpeoplegetslarger.We’realsoseeingmoreandmoreshort-sightedchildrenincitiesallaroundtheworldandthemainreasonmaybethatcitychildrenspendlesstimeoutdoors.Daylightcanbehundredsofti

5、mesbrighterthanindoorlight.Butwhydoesplayingoutside preventusfrombecomingshort-sighted?Scientistsbelievethatnaturallighthasaspecialchemical(化学物质)whichstopstheeyeballfromgrowingoutofshapeandpreventspeoplefrombecomingshort-sighted.Sobeoutdoors.Itdoesn’tmatterifthattimei

6、sspenthavingapicnicorhavingsports.1.  HowmuchtimedidtheAustralianchildrenspendoutdoorsonaverageaccordingtothe       research?A.30minutes. B.60minutes.   C.90minutes.  D.120minutes.2.  WhichofthefollowingisTRUEaccordingtothepassage?A.Ifpeoplespendlesstimeoutdoorstheywi

7、llcertainlybecomeshort-sighted.B.Therearefewershort-sightedSingaporeanChildrenthanAustralianchildrenbecause  theyhavemoreknowledgeofprotectingtheireyesight.C.Therewillbefewerrisksofgettingshort-sightedifpeoplespendtwoorthreehoursa              dayplayingoutside.D.When

8、peoplebegintogotoschooltheywillbecomelong-sighted.3.  Whatisthefifthparagraphmainlyabout?A.Whynaturaldaylighthasaspecialchem