高考英语三轮冲刺真题周周练（三）

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1、高考真题周周练（3）阅读理解Somethinginchocolatecouldbeusedtostopcoughsandleadtomoreeffectivemedicines,sayUKresearchers.Theirstudyfoundthattheobromine,foundincocoa,wasnearlyathirdmoreeffectiveinstoppingcoughsthancodeine,whichwasconsideredthebestcoughmedicineatpresent.TheImperialCo

2、llegeLondonresearcherswhopublishedtheirresultsonlinesaidthediscoverycouldleadtomoreeffectivecoughtreatments.“Whilecoughingisnotnecessarilyharmful(有害的)itcanhaveamajoreffectonthequalityoflife,andthisdiscoverycouldbeahugestepforwardintreatingthisproblem,”saidProfessorPe

3、terBarnes.Tenhealthyvolunteers(志愿者)weregiventheobromine,codeineorplacebo,apillthatcontainsnomedicine,duringtheexperiment.Neitherthevolunteersnortheresearchersknewwhoreceivedwhichpill.Theresearchersthenmeasuredlevelsofcapsaicin,whichisusedinresearchtocausecoughinganda

4、sasignofhowwellthemedicinesarestoppingcoughs.Theteamfoundthat,whenthevolunteersweregiventheobromine,thecapsaicinneededtoproduceacoughwasaroundathirdhigherthanintheplacebogroup.Whentheyweregivencodeinetheyneededonlyslightlyhigherlevelsofcapsaicintocauseacoughcomparedw

5、iththeplacebo.Theresearcherssaidthattheobromineworkedbykeepingdownanerveactivity(神经活动),whichcausescoughing.Theyalsofoundthatunlikesomestandardcoughtreatments,theobrominecausednosideeffectssuchassleepiness.21.AccordingtoProfessorBarnes,theobromine______.A.cannotbeasef

6、fectiveascodeineB.canbeharmfultopeople'shealthC.cannotbeseparatedfromchocolateD.canbeamoreeffectivecureforcoughs22.Whatwasusedintheexperimenttocausecoughing?A.Theobromine.B.Codeine.C.Capsaicin.D.Placebo.23.Welearnfromthetextthatvolunteersintheexperiment______.A.werep

7、atientswithbadcoughsB.weredividedintothreegroupsC.receivedstandardtreatmentsD.sufferedlittlesideeffects24.Whichofthefollowingwouldbethebesttitleforthetext?A.Codeine:ANewMedicineB.ChocolateMayCureCoughsC.CoughTreatment:AHardCaseB.TheobromineCanCauseCoughs阅读七选五Evaluati

8、ngSources(来源)ofhealthInformationMakinggoodchoicesaboutyourownhealthrequiresreasonableevaluation.Akeyfirststepinbetteringyourevaluat