内蒙古北京八中乌兰察布分校2018_2019学年高二英语下学期教学质量调研试题三

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1、内蒙古北京八中乌兰察布分校2018-2019学年高二英语下学期教学质量调研试题三分值：120分时间：100分钟）注意事项：1．答卷前，考生务必将自己的姓名、考号填写在答题卡上。2.将答案写在答题卡上。写在本试卷上无效。3.考试结束后，将答题卡交回。第I卷（选择题，共70分）第一部分  阅读理解（共两节，满分40分）第一节：(共15小题；每小题2分，满分30分)阅读下列短文，从每小题所给的四个选项（A、B、C和D）中，选出最佳选项。ATomostofus,medicinecomesfromadrugsto

2、re.Butoriginally,muchofthemedicinedevelopedinthelastcenturycamefromnaturalsources:plantsorbacteria.Now,agroupofscientistsinGreatBritainarehopingtodevelopamedicinefrompoisonousinsects.Theyareresearchingwhetherthedeadlyvenom（毒液）ofsomeinsectscanworkagainstb

3、acteria.VenomtechlaboratoryAbout400insectsliveinplasticcontainersintheVenomtechlaboratory.Eachcontainerhasanimageofaskullandcrossbones.Theimageswarnthatabitefromtheinsectsinsidecanbeanythingfrompainfultodeadly.Thevenomfromtheseinsectscontainshundredsofch

4、emicalcomponents.Eachcomponenthasadifferenttargetandeffect.Medicalresearchersseparatethevenomintoitscomponentparts.Thentheycreatealibraryofthosecomponents,lookingfortheonesthatcouldbeturnedintonewdrugs.“Someofthemwefoundcankillbacteria,likeEColi,sothey’r

5、everyrelevantatthemomentwheremodernmedicinesarefailing.Andwe’realsofindingvenomthatischangingandkillingcancercells.”Findingnewwaystokillbacteriaisimportanttoresearchers.Onereasonisthatpeoplehaveusedantibiotics(抗生素)somuchthatsomebacteriacannowresistit.For

6、example,tuberculosisusedtobecurablewithantibiotics.Nowitisnot.Howdotheygetthevenomout?Togetasmuchvenomaspossible,researchersfeedtheinsectswellandthenputthemtosleeptemporarily.StevenTrimofVenomtechsaysresearchersanaesthetizetheinsectstomakeremovingtheveno

7、msafer.Afterall,animmobileinsectcannotbite.Researchersthenelectricallystimulatetheinsecttocontract(收缩)themuscleandsqueezethegland(腺).Thepressureproducesasmallamountofvenom.Researchersseparatethevenomintohundredsofproteins.Eachproteincontainsbetweenoneand

8、fivedifferentmolecules(分子).Someday,thosetinymoleculesmightbeturnedintopowerfulnewdrugs.1.Theskullandcrossbonesimagesinplasticcontainersareusedto____________.A.warnpeopleB.comfortpeopleC.frightenpeopleD.encouragepeople2.Wha