2013年职称英语卫生c真题来自教材的原文

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1、www.123zcyy.com电话：400-618-25002013年职称英语卫生C真题来自教材的原文　　Late-nightDrinking　　Coffeeloversbeware.Havingaquick“pick-me-up”cupofcoffee1lateinthedaywillplayhavocwith2yoursleep.Aswellasbeingastimulant,caffeineinterruptstheflowofmelatonin,thebrainhormonethatsendspeopleintoasleep.　　Melat

2、oninlevelsnormallystarttoriseabouttwohoursbeforebedtime.Levelsthenpeakbetween2amand4am,beforefallingagain.3"It'stheneurohormonethatcontrolsoursleepandtellsourbodywhentosleepandwhentowake，，，saysMauriceOhayonoftheStanfordSleepEpidemiologyResearchCenteratStanfordUniversityinCalif

3、ornia.ButresearchersinIsraelhavefoundthatcaffeinatedcoffeehalvesthebody'slevelsofthissleephormone.　　LotanShiloandateamattheSapirMedicalCenterinTelAvivUniversityfoundthatsixvolunteerssleptlesswellafteracupofcaffeinatedcoffeethanafterdrinkingthesameamountofdecaf.Onaverage,subjec

4、tsslept336minutespernightafterdrinkingcaffeinatedcoffee,comparedwith415minutesafterdecaf.Theyalsotookhalfanhourtodropoff4一twiceaslongasusual一andjiggedaround5inbedtwiceasmuch.　　Inthesecondphaseoftheexperiment,theresearcherswokethevolunteerseverythreehoursandaskedthemtogiveaurin

5、esample.Shilomeasuredconcentrationsofabreakdownproductofmelatonin.Theresultssuggestthatmelatoninconcentrationsincaffeinedrinkerswerehalfthoseindecafdrinkers.InapaperacceptedforpublicationinSleepMedicine，theresearcherssuggest6thatcaffeineblocksproductionoftheenzymethatdrivesmel

6、atoninproduction.　　Becauseitcantakemanyhourstoeliminatecaffeinefromthebody，Ohayonrecommendsthatcoffeeloversswitchtodecafafterlunch.　　注释：　　1.haveaquick"pick-me-up"cupofcoffee:喝一杯快速提神的咖啡。pick-me-up意为“提神饮料”，这里用做定语。　　2.playhavocwith:干扰；对造成严重破坏。例如：Thenoiseofenginescanplayterribleha

7、vocwithadriver'snerves.发动机的嘈杂声能严重扰乱驾驶员的神经。　　3.Levelsthenpeakbetween2amand4am,beforefallingwww.123zcyy.com电话：400-618-2500again.褪黑激素的浓度在凌晨2点和4点之间达到最高值，然后再次下降。before在此处可以译为“然后”。　　4.dropoff:睡着。例如:Hedroppedoffinthearmchair.他在扶手椅上睡着了。　　5.jigaround:辗转反侧。jig:急动，蹦蹦跳跳。例如:Stopjiggingabou

8、t,Billy,andjuststandstillforamoment.别到处乱蹦，比利，稳稳地站一会儿。　　6.sugg