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时间:2019-11-05
《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》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、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
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