【阅读理解,阅读下面语言材料,然后按文后要求做题。Spendingtwoorthreehoursplayingoutdoorseachdaycanreduce(减少)achild'schanceofbecomingshort-sighted(近视)res】
阅读理解,阅读下面语言材料,然后按文后要求做题。
Spendingtwoorthreehoursplayingoutdoorseachdaycanreduce(减少)achild'schanceofbecomingshort-sighted(近视)researchshows.Itchallengesthebelifthatshort-sightednessiscausedbycomputerusewatchingTVorreadinginweaklight.
Australiangovernmentresearchersbelievethatsunlightisgoodforpeople'seyes.Theycomparedthevision(视力)andhabitsof100seven-year-oldchildreninChinaandAustralia.Inall30%oftheChinesechildrenwereshort-sighted.ThispercentagewastentimeshigherthanAustralianchildren.
BothgroupsspentasimilaramountoftimereadingwatchingTVandplayingcomputergames.HowevertheAustraliachildrenspentanaverageoftwohoursadayoutdoors90minutesmorethantheChinesechildren.
ProfessorIanMorgansaid“Humansarenaturallylong-sightedbutwhenpeoplebegintogotoschoolandspendlittleornotimeoutdoorsthenumberofshort-sightedpeoplegetslarger.Wearealsoseeingmoreandmoreshort-sightedchildrenincitiesallaroundtheworld-andthemainreasonmaybethatcitychildrenspendlesstimeoutdoors.
Daylightcanbehundredsoftimesbrighterthanindoorlight.Butwhydoesplayingoutsidepreventusfrombecomingshort-sighted?Scientistsbelievethatnaturallighthasaspecialchemical(化学物质)whichstopstheeyeballfromgrowingoutofshapeandpreventspeoplefrombecomingshort-sighted.
Sogooutdoors.Itdoesn'tmatterifthattimeisspenthavingapicnicorplayingsports.
根据材料内容选择最佳答案,并将其标号填入题前括号内。
(1)
Whatcanreduceachild'schanceofbecomingshort-sightedaccordingtothepassage?
[]A.
Playingcomputergames.
B.
watchingTV.
C.
Readingbooks.
D.
Spending2or3hoursplayingoutsideeveryday.