江苏省盱眙中学2017届高三实验班限时训练材料(22)_图文

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1、江苏省吁盼中学2017届高三实验班限时训练材料（22）（建议用20分钟完成A、B、C三篇文章，鼓励同学们挑战D篇）AWeallknowthatthenormalhumandailycycleofactivityisofsome7—8hours，sleepalternationwithsome16—17hours，wakefulnessandthat,broadlyspeaking,thesleepnormallycoincideswith（与一致）thehoursofdarkness・Ourpresentconcerniswithhoweasilyandtow

2、hatextentthiscyclecanbemodified・Thequestionisnomoreanacademicone.Theease,forexample,withwhichpeoplecanchangefromworkinginthedaytoworkingatnightisaquestionofgrowingimportanceinindustrywhereautomationcallsforround-the-clockworkingofmachines.Itnormally,takesfromfivedaystooneweekforaper

3、sontoadapttoareversedroutineofsleepandwakefulness,sleepingduringthedayandworkingatnight.Unfortunately,itisoftenthecaseinindustrythatshiftsarechangedeveryweek;apersonmayworkfrom12midnightto8a.m.oneweek,8a.m.lo4p.m.thenext,and4p.m.to12midnightthethirdandsoon.Thismeansthatnosoonerhashe

4、gotusedtooneroutinethanhehastochangetoanother,sothatmuchofhistimeisspentneitherworkingnorsleepingveryefficiently.Theonlyrealsolutionappearstobetohandoverthenightshifttoanumberofpermanentnightworkers.Aninterestingstudyofthedomesticlifeandhealthofnight-shiftworkerswascarriedoutbyBrown

5、in1957.Shefoundahighincidence（发生率）ofdisturbedsleepandotherdisordersamongthoseonaltematingdayandnightshifts,butnoabnormaloccurrenceofthesesphenomenaamongthoseonpermanentnightwork・Thislattersystemthenappearstobethebestlong-termpolicy,butmeanwhilesomethingmaybedonetorelievethestrainsof

6、alternativedayandnightworkbyselectingthosepeoplewhocanadaptmostlikelytothechangeofroutine.Onewayofknowingwhenapersonhasadoptedisbymeasuringhisbodytemperature.Peopleengagedinnormaldaytimeworkwillhaveahightemperatureduringthehoursofwakefulnessandalowoneatnight;whentheychangetonightwor

7、kthepatternwillonlygraduallygobacktomatchthenewroutineandthespeedwithwhichitdoessoparallels,broadlyspeaking,theadaptationofthebodyasawhole,particularlyintermsofperformance・Therefore,bytakingbodytemperatureatintervalsoftwohoursthroughouttheperiodofwakefulnessitcanbeseenhowquicklyaper

8、soncanadapttoarever