Withoutregularsuppliesofsomehormonesourcapacitytobehavewouldbeseriouslyimpaired;withoutotherswewouldsoondie.Tinyamountsofsomehormonescanmodifymoodsandactions,ourinclinationtoeatordrink,ouraggressivenessorsubmissiveness,andourreproductiveandparentalbehavior.Andhormonesdomorethaninfluenceadultbehavior;earlyinlifetheyhelptodeterminethedevelopmentofbodilyformandmayevendetermineanindividual’sbehavioralcapacities.Laterinlifethechangingoutputsofsomeendocrineglandsandthebody’schangingsensitivitytosomehormonesareessentialaspectsofthephenomenaofaging.
Communicationwithinthebodyandtheconsequentintegrationofbehaviorwereconsideredtheexclusiveprovinceofthenervoussystemuptothebeginningofthepresentcentury.TheemergenceofendocrinologyasaseparatedisciplinecanprobablybetracedtotheexperimentsofBaylissandStarlingonthehormonesecretion.Thissubstanceissecretedfromcellsintheintestinalwallswhenfoodentersthestomach;ittravelsthroughthebloodstreamandstimulatesthepancreastoliberatepancreaticjuice,whichaidsindigestion.Byshowingthatspecialcellssecretchemicalagentsthatareconveyedbythebloodstreamandregulatedistanttargetorgansortissues.Baylissandstarlingdemonstratedthatchemicalintegrationcouldoccurwithoutparticipationofthenervoussystem.
Theterm“hormone”wasfirstusedwithreferencetosecretion.StarlingderivedthetermfromtheGreekhormone,meaning“toexciteorsetinmotion.Theterm“endocrine”wasintroducedshortlythereafter“Endocrine”isusedtorefertoglandsthatsecretproductsintothebloodstream.Theterm“endocrine”contrastswith“exocrine”,whichisappliedtoglandsthatsecrettheirproductsthoughductstothesiteofaction.Examplesofexocrineglandsarethetearglands,thesweatglands,andthepancreas,whichsecretspancreaticjuicethroughaductintotheintestine.Exocrineglandsarealsocalledductglands,whileendocrineglandsarecalledductless.
1.Whatistheauthor’smainpurposeinthepassage?
A.Toexplainthespecificfunctionsofvarioushormones.
B.Toprovidegeneralinformationabouthormones.
C.Toexplainhowtheterm“hormone”evolved.
D.Toreportonexperimentsinendocrinology.
2.Thepassagesupportswhichofthefollowingconclusions?
A.Thehumanbodyrequireslargeamountsofmosthormones.
B.Synthetichormonescanreplaceaperson’snaturalsupplyofhormonesifnecessary.
C.Thequantityofhormonesproducedandtheireffectsonthebodyarerelatedtoaperson’sage.
D.Theshortchildoftallparentsverylikelyhadahormonedeficiencyearlyinlife.
3.ItcanbeinferredfromthepassagethatbeforetheBaylissandStarlingexperiments,mostpeoplebelievedthatchemicalintegrationoccurredonly___.
A.duringsleep.
B.intheendocrineglands.
C.undercontrolofthenervoussystem.
D.duringstrenuousexercise.
4.Theword“liberate”couldbestbereplacedbywhichofthefollowing?
A.EmancipateB.DischargeC.SurrenderD.Save
5.Accordingtothepassageanothertermforexocrineglandsis___.
A.ductglands
B.endocrineglands
C.ductlessglands
D.intestinalglands.
翻译：
中华民族的传统文化博大精深、源远流长。早在2000多年前，就产生了儒家学说和道家学说，以及其他很多在中国思想史上有地位的学说流派，这就是有名的“诸子百家”。从孔夫子到孙中山，中华民族传统文化有它的很多珍贵品质。比如“天下兴亡，匹夫有责”的爱国情操，“民为邦本”、“民贵君轻”的民本思想和“己所不欲，勿施于人”的行为准则。
PARTVREADINGCOMPREHENSION
Inthissectiontherearefourpassagesfollowedbyquestionsorunfinishedstatements,eachwithfoursuggestedanswersmarkedA,B,CandD.Choosetheonethatyouthinkisthebestanswer.
TEXTA
Racket,dinclamor,noise,whateveryouwanttocallit,unwantedsoundisAmerica'smostwidespread
nuisance.Butnoiseismorethanjustanuisance.Itconstitutesarealandpresentdangertopeople'shealth.Day
andnight,athome,atwork,andatplay,noisecanproduceseriousphysicalandpsychologicalstress.Nooneis
immunetothisstress.Thoughweseemtoadjusttonoisebyignoringit,theear,infact,neverclosesandthe
bodystillresponds—sometimeswithextremetension,astoastrangesoundinthenight.
Theannoyancewefeelwhenfacedwithnoiseisthemostcommonoutwardsymptomofthestressbuilding
upinsideus.Indeed,becauseirritabilityissoapparent,legislatorshavemadepublicannoyancethebasisof
manynoiseabatementprograms.Themoresubtleandmoreserioushealthhazardsassociatedwithstress
causedbynoisetraditionallyhavebeengivenmuchlessattention.Nevertheless,whenweareannoyedormade
irritablebynoise,weshouldconsiderthesesymptomsfairwarningthatotherthingmaybehappeningtous,
someofwhichmaybedamagingtoourhealth.
Ofmanyhealthhazardstonoise,hearinglossisthemostclearlyobservableandmeasurablebyhealth
professionals.Theotherhazardsarehardertopindown.Formanyofus,theremaybeariskthatexposuretothe
stressofnoiseincreasessusceptibilitytodiseaseandinfection.Themoresusceptibleamongusmayexperience
noiseasacomplicatingfactorinheartproblemsandotherdiseases.Noisethatcausesannoyanceandirritability
inhealthpersonsmayhaveseriousconsequencesforthesealreadyillinmindorbody.
Noiseaffectsusthroughoutourlives.Forexample,thereareindicationsofeffectsontheunbornchildwhen
mothersareexposedtoindustrialandenvironmentalnoise.Duringinfancyandchildhood,youngstersexposed
tohighnoiselevelsmayhavetroublefallingasleepandobtainingnecessaryamountsofrest.
Why,then,istherenotgreateralarmaboutthesedangers?Perhapsitisbecausethelinkbetweennoiseand
manydisabilitiesordiseaseshasnotyetbeenconclusivelydemonstrated.Perhapsitisbecausewetendto
dismissannoyanceasapricetopayforlivinginthemodernworld.Itmayalsobebecausewestillthinkof
hearinglossasonlyanoccupationalhazard.
1.InParagraph1,thephrase"immuneto"areusedtomean___.
A.unaffectedby
B.hurtby
C.unlikelytobeseenby
D.unknownby
2.Theauthor'sattitudetowardnoisewouldbestbedescribedas___.
A.unrealistic
B.traditional
C.concerned
D.hysterical
3.Whichofthefollowingbeststatesthemainideaofthepassage?
A.Noiseisamajorproblem;mostpeoplerecognizeitsimportance.
B.Althoughnoisecanbeannoying,itisnotamajorproblem.
C.Noiseisamajorproblemandhasnotyetbeenrecognizedassuch.
D.Noiseisamajorproblemaboutwhichnothingcanbedone.
4.Theauthorcondemnsnoiseessentiallybecauseit___.
A.isagainstthelaw
B.canmakesomepeopleirritable
C.isanuisance
D.inagangertopeople'shealth
5.Theauthorwouldprobablyconsiderresearchabouttheeffectsnoisehasonpeopletobe___.
A.unimportant
B.impossible.
C.awasteofmoney
D.essential
John'sscoreonthetestisthehighestintheclass;he____lastnight.