2017年高考英语一轮复习 Unit 5 First aid课时作业 新人教版必修5

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1、Unit5FirstaidⅠ.阅读理解A体裁：说明文　话题：医学　词数：271　时间：6′Ascoldseasonapproaches，manyAmericanswillbuyalotofvitaminCandechinacea(紫锥菊)inordertoavoidcatchingacold.Butpayingattentiontoanoldpieceofadviceabouthavingenoughsleepeverydaymightbemoreimportant.Researchsuggeststhatpoorsleepcanincrease

2、thechancetocolds.Studieshaveshownthatpoorsleepandachancetocatchacoldgohandinhand，andscientiststhinksleepplaysanimportantroleinthebody'sdefenses.InarecentstudyforTheArchivesofInternalMedicine，scientistsfollowed153menandwomenfortwoweeks，keepinganeyeontheirqualityandduration(持续性

3、)ofsleep.Then，duringafive－dayperiod，theyexposedthemtocoldviruses.Thosewhosleptanaverageoffewerthansevenhoursanight，itturnedout，werethreetimesaslikelytogetsickasthosewhoaveragedatleasteighthoursanight.Sleepandimmunity(免疫)，itseems，aretightlylinked.Studieshavefoundthatmammalstha

4、trequirethemostsleepalsoproducegreaterlevelsofdisease－fightingwhitebloodcells—butnotredbloodcells，eventhoughbothareproducedinbonemarrow(骨髓)andstemfromthesameprecursor.AndresearchersattheMaxPlanckInstituteforEvolutionaryAnthropologyhaveshownthatspeciesthatsleepmorehavegreaterr

5、esistanceagainstpathogens(病原体)．“Peoplewhohavelongersleepeverynight，”thePlanckscientistswrote，“appeartobeabletostrengthentheirimmunesystemsandbebetterprotected.”【语篇解读】　随着天气变冷，越来越多的人将会感冒。如何才能在寒冷的季节避免感冒的侵袭？研究表明，充足的睡眠将会保护你不受感冒的威胁。1．Whichofthefollowingcanbethebesttitleofthepassage

6、?A．TheBestWaytoAvoidCatchingaColdinWinter.B．TheRelationshipbetweenSleepandImmunity.7C．LackofSleepIncreasestheRiskofCatchingaCold.D．HowtoStrengthenYourImmuneSystems?答案　C　[主旨大意题。通读全文可知本文主要讲述的是充足的睡眠可以减少得感冒的机会，也就是说缺乏睡眠会增加得感冒的风险。故C可作文章的标题。]2．Fromthepassagewecaninferthat________．A．

7、vitaminCandechinaceacanhelpresistcoldsB．thelongeryousleep，thehealthieryouwillbeC．peopledidn'tknowtherelationshipbetweensleepandcoldsbeforeD．people'simmunitycanbegainedmostlyfromsleep答案　A　[推理判断题。根据短文第一句可知答案。B项没有依据；C项根据Butpayingattentiontoanoldpieceofadviceabouthavingenoughslee

8、peverydaymightbemoreimportant可排除；D项没有依据。]3．Wecandrawaconclusionfromt