- 阅读理解A
题干：Weallknowthatthenormalhumandailycycleofactivityisofsome7-8hours’sleepalternationwithsome16-17hours’wakefulnessandthat,broadlyspeaking,thesleepnormallycoincideswiththehoursofdarkness.Ourpresentconcerniswithhoweasilyandtowhatextentthiscyclecanbemodified.Thequestionisnomereanacademicone.Theease,forexample,withwhichpeoplecanchangefromworkinginthedaytoworkingatnight,isaquestionofgrowingimportanceinindustrywhereautomationcallsforround-the-clockworkingofmachines.Itnormallytakesfromfivedaystooneweekforapersontoadapttoareversedroutineofsleepandwakefulness,sleepingduringthedayandworkingatnight.Unfortunately,itisoftenthecaseinindustrythatshiftsarechangedeveryweek;apersonmayworkfrom12midnightto8a.m.oneweek,8a.m.to4p.m.thenext,and4p.m.to12midnightthethird,andsoon.Thismeansthatnosoonerhashegotusedtooneroutinethanhehastochangetoanother,sothatmuchofhistimeisspentneitherworkingnorsleepingveryefficiently.Theonlyrealsolutionappearstobetohandoverthenightshifttoanumberofpermanentnightworkers.AninterestingstudyofthedomesticlifeandhealthofnightshiftworkerswascarriedoutbyBrownin1957.Shefoundahighincidence（发生率）ofdisturbedsleepandotherdisordersamongthoseonalternatingdayandnightshifts,butnoabnormaloccurrenceofthesephenomenaamongthoseonpermanentnightwork.Thislattersystemthenappearstobethebestlong-termpolicy,butmeanwhilesomethingmaybedonetorelievethestrainsofalternatedayandnightworkbyselectingthosepeoplewhocanadaptmostquicklytothechangesofroutine.Onewayofknowingwhenapersonhasadaptedisbymeasuringhisbodytemperature.Peopleengagedinnormaldaytimeworkwillhaveahightemperatureduringthehoursofwakefulnessandalowoneatnight;whentheychangetonightwork,thepatternwillonlygraduallygobacktomatchthenewroutineandthespeedwithwhichitdoessoparallels,broadlyspeaking,theadaptationofthebodyasawhole,particularlyintermsofperformance.Therefore,bytakingbodytemperatureatintervalsoftwohoursthroughouttheperiodofwakefulnessitcanbeseenhowquicklyapersoncanadapttoareversedroutine,andthiscouldbeusedasabasisforselection.Sofar,however,suchaformofselectiondoesnotseemtohavebeenappliedinpractice.
题目：The best solution for implementing the 24-hour working system seems to be（）. - A 、to change shifts at longer intervals
- B 、to have longer shifts
- C 、to arrange for some people to work on night shifts only
- D 、to create better living conditions for night workers
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参考答案【正确答案：C】
本题考核考生对文章具体内容的理解。第3段第1句说，“要真正解决这个问题似乎只有把夜班活交给一批固定干夜班的工人去干”。第4段第1句又说，“这种专人干夜班的方法看来不失为最佳的长远之计。”所以选项C是答案。其他3个选项文章都没有提到，都不正确。
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