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1、阅读复习资料-----九年级1.Uptotwothirdsofchildrendon’tgetasmuchsleepastheyshoulddo,andthiscanmakethemnervousandsloweratschool,researcherssay.Dohowlongshouldyoungpeoplesleepeachnight?Theanswerisbetweeneightandtenhours.Ifyoudon’tgetenoughsleepatnight,you’llhavelessenergythenextday.Butt
2、heresearcherssaymanychildrenhavemissedouton4,500hoursofsleepbythetimetheyaresevenyearsold.TheysaythatchildrenmisssleepbecausetheyhaveTVsandcomputersintheirrooms,andbusyparentsdon’treadtotheiryoungerchildrenatnightanymore.Thetraditional“bedtimestory”helpschildrentorelaxandfa
3、llasleeppeacefully.ChildrenwithTVsandcomputersintheirbedroomsweremorelikelytosleepbadly,andtogetlessthaneighthourssleep.Evenlosingonehour’ssleepanightcanmeanthatchildrendolesswellatschool.Germanscientiststhinkthatyourbrainkeepsworkingwhileyou’reasleep.Toshowthattheywererigh
4、t,theygavetwogroupsofpeoplestayedawake.Theresult?Thepeoplewhosleptworkedoutanswermorequickly,suggestingtheirbrainshadbeentryingtofindtheanswerwhilethepeoplewereasleep.So,makesureyougetenoughsleeptonight,andyou’llbeatyourbesttomorrow!.nervousandsloweratschool,researcherssay.
5、Sohowlongshouldyoungpeoplesleepeachnight?Theanswerisbetweeneightandtenhours.Ifyoudon’tgetenoughsleepatnight,you’llhavelessenergythenextday.Buttheresearcherssaymanychildrenhavemissedouton4,500hoursofsleepbythetimetheyaresevenyearsold.Theysaythatchildrenmisssleepbecausetheyha
6、veTVsandcomputersintheirrooms,andbusyparentsdon’treadtotheiryoungerchildrenatnightanymore.Thetraditional“bedtimestory”helpschildrentorelaxandfallasleeppeacefully.ChildrenwithTVsandcomputersintheirbedroomsweremorelikelytosleepbadly,andtogetlessthaneighthourssleep.Evenlosingo
7、nehour’ssleepanightcanmeanthatchildrendolesswellatschool.Germanscientiststhinkthatyorbrainkeepsworkingwhileyou’reasleep.Toshowthattheywereright,theygavetwogroupsofpeoplestayedawake.Theresult?Thepeoplewhosleptworkedoutanswermorequickly,suggestingtheirbrainshadbeentryingtofin
8、dtheanswerwhilethepeoplewereasleep.So,makesureyougetenoughsleeptonight,andyou’llbe
