Unit21HumanBiology众所周知，疾病总是困扰我们的健康，有些秘诀可以帮助我们保持健康。FourSecretsToNeverGettingSickEverwonderwhyyoualwaysseemtocomedownwithalifeinterruptingvirusthistimeofyear，whileotherwomenyouknowsailthroughtheseasonssniffle-free，coughfree，andachefree?Followthesesimplestepstoboostyourvirusprotection：MakeFriendsWithFreshAirNotonlydoesescapingintothefreshairgiveyouabreakfromallthosegermscirculatinginside，butgoingforastrollcanactuallyboostyourimmunity.RelaxationFightsOffColdsBeingstressedwillincreaseyoursusceptibilitytocatchingacold.Thatmaybebecause，overthelongterm，itleadstotheongoingreleaseofstresshormones(荷尔蒙)，suchasglucocorticoids(糖皮质激素)．CleanHandsAreEverythingColdandflucanspreadalltooeasilythroughtouch.Keepyourfingersawayfromyoureyes，nose，andmouthasmuchaspossible，andmakesuretomastertheartofhandwashing.Soapandwaterremainyourmosteffectivetoolsthere.EnoughSleepIsTheMagicBulletAnoccasionalrestlessnightisnothingtoworryabout，butacontinuouslackofsleepcanhamperyourimmune(免疫)system'sabilitytofunction.Anythingshortofsevenhoursnearlytriplesyouroddsofcatchingacold.[阅读障碍词]1．boostvt.促进；使增加2．strolln.漫步；闲逛3．susceptibilityn.敏感性；易感性4．hampervt.妨碍；阻止5．triplevt.(使某物)增至三倍[诱思导读]1．Whydoweoftenwashourhandsinordernottocatchacold?Becausecoldandflucanspreadeasilythroughtouchandweoftentouchsomethingwithourhands.2．Howcancoldandfluspread?Bytouch.SectionⅠReading(Ⅰ)(Warmup&Lesson1)Ⅰ.匹配下列单词的词性及汉语意思()1.pumpA．adj.强制性的，义务的()2.digestB．adj.每年的，一年一次的，年度的()3.swapC．vt.寻找()4.abuseD．adj.有争议的()5.fundamentalE．vi.用泵抽出(注入)()6.seekF．vt.消化()7.annualG．vi.交换()8.lameH．adj.根本的；基础的()9.compulsoryI．adj.站不住脚的，不易令人相信的()10.controversialJ．vt.滥用[答案]1－5EFGJH6－10CBIADⅡ.选择下列句中词组的汉语意思()1.Isuspectthatheismoreorlessinvolvedintheaffair.()2.Thishascontributedtothelackofconfidenceinthepolice.()3.Icameacrossoneofmyoldclassmateslastnight.()4.BythetimeIgottothetopofthehill,Iwasquiteoutofbreath.()5.Wereceivedseveralanswers,andwepickedoneatrandom.()6.Thosepresentjustlookedateachotherinsilence.[答案]1－6CDFBEA100metresin8seconds?Manycontemporaryamateur(业余的)athleteswouldhavebrokenworldrecordsiftheyhadtakenpartinthefirstOlympicGames.①Sincethen,recordshavefallenintrackandfieldyearafteryearasathleticperformanceshavecontinuallyimproved.Ifrecordsfall,itisusuallyduetobetterequipment,traininganddiet,butrecently,improvementshavebeguntoslowdown.Atthe2000Olympics,onlythreerunnersachievedOlympicbestswithnoworldrecords.Someexpertspredictaceilingformanyevents,suchas9.5secondsforthe100metres—MauriceGreene'scurrentrecordis9.79seconds.However,pastpredictionshavenearlyalwaysbeenprovedwrong.Whenwetalkaboutbreakingrecords,wecomeacrosstheissue(问题)ofperformanceenhancing(增强表现的)drugs.Thesedrugsareoriginallydevelopedtohelppeoplewithillnesses,butinthewronghands②，theycreatesupreme(极度的)athletesmakingthemfasterandstrongerthanisnormalforhumanbeings.Takingthesedrugsisknownas“doping”(服兴奋剂)andalthoughtheyenhanceperformance,theyalsocauseserioushealthproblemsinlaterlifeforthosewhoabusethem.③百米记录8秒？假如许多当代的业余选手参加了第一届奥运会的话，他们有可能打破世界纪录。从此，由于运动员成绩不断提高，田径项目的记录日益下跌。假设记录下跌，通常是由于设施，训练及饮食得以改...
