全国1卷2020年高三英语模拟预测卷四.doc

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1、考试（全国1卷）2020年高三英语模拟预测卷（四）本试卷6页，满分120分。考试用时120分钟注意事项：1.答卷前，考生务必用黑色字迹的钢笔或签字笔将自己的校名、某某、考号、座位号等相关信息填写在答题卡指定区域内。2.选择题每小题选出答案后，请用2B铅笔把答题卡上对应题目的答案标号涂黑；如需改动，用橡皮擦干净后，再选涂其他答案；不能答在试卷上。.3.非选择题必须用黑色字迹的钢笔或签字笔作答，答案必须写在答题卡各题目指定区域内的相应位置上；如需改动，先划掉原来的答案，然后再写上新的答案；不准使用铅笔

2、和涂改液，不按以上要求作答的答案无效。4.考生必须保证答题卡的整洁。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，从每题所给的四个选项(A、B、C和D)中，选出最佳选项，并在答题卡上将该项涂。AInthelast50years,seasurfacetemperaturesaroundAntarcticahaverisenby1-2°C,whichismorethantwicetheglobalaverage.LossofspeciesGlobalw

3、armingcouldbasicallychangetheecosystem,leadingtothelossofsomespecies.SharksaregoingtoarriveinAntarcticaaslongasthewarmingtrendcontinues,abitmoreslowlythancrabs-crabsaregoingtogettherefirst,butoncetheydogettheretheyareabletoeattheorganismsthatlivethere

4、.16/16考试ProfessorWilgasaidthearrivalofsharksandshell-crushingbonyfisheswouldleadtogreatchangesinthenumberandproportions(比例)ofspeciesfoundthere.Shrimp,ribbonwormsandbrittlestarsarelikelytobethemostattackabletopopulationdeclines.Animalslivinginshallowwa

5、terinAntarcticaareuniqueonEarthtodaybecausetheyevolved(进化)inaverycoldenvironmentovertensofmillionsofyears.ExtremeconditionsInthecourseofaprocesswecallAntarcticcoolingthatstartedabout40millionyearsago,allmajorseafloorpredatorssuchassharksandcrabswentex

6、tinctinAntarcticabecausetheywerenotabletodealwiththeseextremeconditions.However,todayglobalwarmingisremovingbarrierstoinvasionsandwe’veseenrecentlythatcrabs,especiallykingcrabs,areonthedoorstepofAntarctica-theycanpotentiallyre-invadetheshallowwatersif

7、warmingcontinues.Urgentlocalandglobalactionsareneededtoprotectthislastenvironmentandmeasuresareneededtostopalienspeciesbeingbroughtinthroughships.StrangecreaturesAnimalsthatliveontheseafloorofAntarcticaaresomeofthestrangestcreaturesonEarth.Theextremec

8、oldanddarknesshaspresentedhugechallengestomarinelifeoverthepassageoftime,leadingtotheevolutionoffishequippedwithanti-freezeproteinsintheirblood.1．HowwillthesealienspeciesaffecttheecosysteminAntarctica?A．Theywillchangetheextremelycoldconditions