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1红河州一中2023年秋季学期高二十月月考化学试卷答案

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whichdancing,thevounghov.lookingoutthehosni..cherishfoodandkeepareasonablediet.Acrossthecountry,about20%ofallthefoodendsupinthetrash.Thatfoodwa1分，满cotheaveragefamilyoffourbouttakespaespace交换修改废弃物填埋扬》.Nowttimetogetcu6erg0tinerh处错误),并在foodandwaste.28.Whatisthepurposeoftheproposal?词下面A.Tostopfoodwaste.B.ToimproveMeituan'sprofits.一词；C.Toattractmorecustomers.D.TopromotethepopularityofMeituan.第1129.Whatdoestheunderlinedword"eliminate"inparagraph2mean?A.Restart.B.Recall.C.Research.D.Remove.tthe30.HowdopopularChinesevideoplatformsreacttothecampaign?tionhA.Negatively.B.PositivelyC.Doubtfully.wasD.Angrily31.Whatdoesthelastparagraphsuggest?tativeA.Foodcostsfamiliesmuchmoney.erveB.Mostofthefoodpeopleboughtiswasted.C.Foodwastecausesdamagetotheenvironment.waD.Customersshouldhaveagoodrelationshipwithothers.estBasedonboneandtoothrecords,mammoths()werethoughttohavegoneextincttoabout12,000yearsago.Butanewgeneticsamplingtechniquesuggeststhegreatbeastsmayhavestuckaroundalotlonger.Thestoryisinthesoil.Bonesarerichsourcesofprehistoriegeneticinformation,butnottheonlyones;itemsrangingfromshedIceAgeskincellstopineneedlescancontributetothegeneticrecordstoredindirt..Paleogeneticists(古遗传学家)havebeenanalyzing“environmentalDNA”fromsoilfor0alongtime,butgettingridofnon-DNAmaterialwithoutdestroyingthesefragilecluesisdaunting(使人气馁的)."EnvironmentalsamplescontainahugerangeofotherchemicalsubstancesthatarehardtoseparatefromtheDNA,"saysMeMasterUniversitygeneticistTylerMurchie."Wecan'taffordtolosewhateverwecanget.Inthenewapproach,soilsamplesaregotandthenbrokenintosmallerportions,stirredandrunthrougha"coldspinmethod"toseparateasmuchDNAaspossible.TheDNAisthencomparedagainstanexistinggeneticlibrarytodetectspeciesmatches.ThemethodislimitedbecauseresearchersusingitneedtoknowwhatDNAtolookfor.Ifasaber-toothedcatspeciesisnotalreadyinthegeneticlibrary,forexample,theanalysiscannotdetectthatanimal.Forknownspecies,however,theprocessmayyieldexcitinginformation.Intheirstudy,theresearchersdetectedabout2,100kindsofplantsand180animals.Notyetpublishedresultsfromotherfieldsitesareyieldingsimilarresults,Murchiesays,andfuturefossildiscoveriescouldstrengthenthecase."Wecanusethisapproachtoidentifyspeciesinplacesandtimesweneverknewtheyexisted,"headds.32.Whydoestheauthormention"mammoths"inparagraph1?A.Topresentafact.B.Toshowusanextinctanimal.C.Tocorrectamistake.D.Tointroducethetopicofthepassage.【2023年分科诊断测试卷（五）·英语，第5页（共8页）】

2.关于反应Na2S2O3+H2SO4Na2SO4+S+SO2+H2O4下列说法正确的是A.H2SO4发生还原反应B.Na2S2O3,既是氧化剂又是还原剂C.氧化产物与还原产物的物质的量之比为2:1D.1molNa2S2O3发生反应,转移4mol电子

14.已知反应Na2SO4+BaCl2BaSO4+2NaCl,,下列说法错误的是A.可用焰色反应来鉴别Na2SO4化合物中的钠元素B.检验SO4^2-时,应先加入过量的稀盐酸,再加入氯化钡溶液C.氯化钠在生活中的用途:腌制腊肉D.该反应中,每消耗2.08gBaCl2,,同时生成0.1molBaSO4

1红河州一中2023年秋季学期高二十月月考化学