内蒙古2020学年高二英语下学期教学质量调研试题三.doc

《内蒙古2020学年高二英语下学期教学质量调研试题三.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、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,medicinecomesfromadrugstore.Butoriginally,muchofthemedicinedevelopedinthelastcenturycamefrom

2、naturalsources:plantsorbacteria.Now,agroupofscientistsinGreatBritainarehopingtodevelopamedicinefrompoisonousinsects.Theyareresearchingwhetherthedeadlyvenom（毒液）ofsomeinsectscanworkagainstbacteria.VenomtechlaboratoryAbout400insectsliveinplasticcontainersintheVenomtechlaboratory.Eachcontainerhasanim

3、ageofaskullandcrossbones.Theimageswarnthatabitefromtheinsectsinsidecanbeanythingfrompainfultodeadly.Thevenomfromtheseinsectscontainshundredsofchemicalcomponents.Eachcomponenthasadifferenttargetandeffect.Medicalresearchersseparatethevenomintoitscomponentparts.Thentheycreatealibraryofthosecomponent

4、s,lookingfortheonesthatcouldbeturnedintonewdrugs.“Someofthemwefoundcankillbacteria,likeEColi,sothey’reveryrelevantatthemomentwheremodernmedicinesarefailing.Andwe’realsofindingvenomthatischangingandkillingcancercells.”Findingnewwaystokillbacteriaisimportanttoresearchers.Onereasonisthat-13-peopleha

5、veusedantibiotics(抗生素)somuchthatsomebacteriacannowresistit.Forexample,tuberculosisusedtobecurablewithantibiotics.Nowitisnot.Howdotheygetthevenomout?Togetasmuchvenomaspossible,researchersfeedtheinsectswellandthenputthemtosleeptemporarily.StevenTrimofVenomtechsaysresearchersanaesthetizetheinsectsto

6、makeremovingthevenomsafer.Afterall,animmobileinsectcannotbite.Researchersthenelectricallystimulatetheinsecttocontract(收缩)themuscleandsqueezethegland(腺).Thepressureproducesasmallamountofvenom.Researchersseparatethevenomintohundredsofproteins.Eachproteincontainsbetweenoneandfivedifferentmolecules(分

7、子).Someday,thosetinymoleculesmightbeturnedintopowerfulnewdrugs.1.Theskullandcrossbonesimagesinplasticcontainersareusedto____________.A.warnpeopleB.comfortpeopleC.frightenpeopleD.encouragepeople2.Whatdoestheunderlinedwo