衡水金卷先享卷2022-2023学年度高三一轮复习摸底测试数学

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1、衡水金卷先享卷2022-2023学年度高三一轮复习摸底测试数学

2、2022—2023学年度高三一轮复习摸底测试卷衡水金卷先享题数学二

3、衡水金卷先享题2022-2023高三一轮地理摸底卷

9.D【命题意图】本题考查两角差的正弦公式、诱导公式、三角函数值的范围,体现了数学运算、逻辑推理等核心素养.【解析】∵sin(a-B)= sIn acosβ- cos asin B,sin(a-B)=sin acos B, . cos asin B=0,.a=k丌+(k∈Z)或B=m(m∈Z)对于A,当a=k:2(k)时,如a+0=+2)+当k为奇数时,sina+cosB=-1+osB≤0,故A不定成立对于B,当α=k丌+(k∈Z)时,sn(aB)=sin(k丌+可=cos(kT-B)=±cosB∈[-1,1],故B不一定成立对于C,当a=km+T(k∈Z)时,im2a+sin2=mn(24B+sIn=2+si0222;当B=m(m∈Z)时,sn3号+sin2y,m为偶数,2TEsin-+sn故C+sin2,m为奇数,不一定成立对于D,当a=k丌+T(k∈Z)时,sin’atcos’Bsin(kT+m)+cos’B=1+cos’B>当B=mm(m∈Z)时,sin2a+cos3B=sin2c0s2mm=in2a+1≥1,故D一定成立选D.s名师评題本题以两角差的正弦公式为背景,根据条件挖掘出两角的值是解本题的关键,也是本题的创新之处,再代入各选项进行判断.在平时的学习中要防止思维定式,打破惯有的思维,努力提高自身的学科素养,以不变应万变

(Text1)W:Excuseme,couldyoupleasetellmehowtogettoLujinTeashop?Ijustmovedhereandknowlittleaboutthiscity.M:Oh,sorryIdon’tactuallylivelere.ImvisitingfromAustraliaonholiday(Text2)W:Jimsaidwehadtoputofthemeetingthisafternoon.Hisdaughter’ssickandheneedstogohomeearlytotakecareofher.M:Sowehavetocontactourcustomeraboutthechangeoftime,amIright?(Text3)W:Hey,John!Areyouoffnow?Ivejustfinishedmyworkbutit’sraiingheavilyoutside.Canyoupickmeuponyourwayhome?M:Noproblem.Justremembertotakeyourumbrella.(Text4)M:Ahurricaneisanextremelystrongwindorstorm.ItformsoverwarmoceanwatersnearthehotregionsonEarthandisusuallyconnectedwithtemperatureandpressuredifferences.W:That’sinteresting.Couldyoutellmemoreaboutit?(Text5)W:Themovie’saboutlifeandhappinessandit’sagreattheme,buttheplot,howshouldIputit,isn’tneatlywerkedout.M:Hmm,thewayIseeit,IthinkNicoleKidmanisattractive.Butapartfromthat.Ireallywishwedchosenanotherone.(Text6)W:Nowadaysmanypeoplearesub-healthy.M:There’sprobablysomethinginthat,butIhaterepeatedlybeingtoldbythemediathatI’mnothealthyenough.Myhealthmanageralsowantsmetotakethatmessageonboard.d.W:Sowhatdopeopledo?Theyjoinagym,spendafortuneonfitnessequipment,andthenwithinafewweekstheygetfedupwithit.M:Maybeweshoulddependmoreonourselvesandmanagetofollowthescheduleswemake.Ahealthydietalsohelps.W:That’strue.Itsevenbetterifyoucouldfindapartner.(Text7)M:Linda,whatareyouplanningtodofortheChristmasandNewYearholidays?W:ForChristmas,IwillstaywithmyparentsinLondon.ThenforNewYear,IwillvisitafriendwholivesinEdinburgh.M:Thatwillbegreat.I’vealwayswantedtocelebrateNewYearinScotland.Iknowthecelebrationstherearegreatfun.w:TheycallitHogmanayinScotiand.AndwewillgotoPrincesStreettojointhebigparty.M:Whatwillyoudoattheparty?W:Justhavefungointosomepubsforsomedrinksandwatchalltheperformances.M:Itsoundsgreat.W:Yes.AndthebestbitissingingAuldLangSynewhentheclockstrikesmidnight.(Text8)W:Hey,Jack.Whereareyouoffto?TheradiosaidtherewouldbestormsthisFriday.You’dbetterstoprunnigaboutandgohome.M:Iknowthestormsarecoming,butthatwillbethedayaftertomorrow.ImustprepareforitIvealreadygotenoughdrinkingwater,conveniencefood,flashlightsandbatteriesandabattery-poweredradio.I’dliketogetasmallboatandsomelifejackets.W:It’sagreatideatohavesomelifejackets!IveboughtmanyandIcangiveyousome.Buttheboatisn’treallynecessary.Duringstorms,thewindandrainwillbestrongerthanyoucanimagine,sotheboatwillbeoflittleuse.MOK.WhatelseshouldIdo?W:Hmm,whydon’tyougobackhomenowandccloseallyourdoorsandwindows?M:FinePleaseremembertosendmethelifejajackets.r(Text9)M:Haveyouseenthenews?ThefloodinMiddleTennessecwasjusthorrible.w:No,butmyunclecalledmeyesterday.Helivesinasmalltownthere.EverythingsOKwithhim,butothertownsweren’tthatlucky.MyfriendKansasownedarestaurantthereItwasatotalloss.Hehadaboutsixfeetofwaterinsidehisrestaurantandalltheequipmentwasdamaged.M:Whatadisasterw:Itis!Afiremansaveda7-month-oldbabygirlonthesecondfloorofagymyesterday.Heriskedhislifetocatchthebabywhenshewassweptaawayfromherfathersarms.M:Howbrave!IwishIcoulddosomethingtohelp.W:Hmm,alocalgroup’slookingforvolunteerswhocouldcarefortheinjured.Icangiveyouthephonenumber.Myparentswouldn’tallowmetogo.sowesentsomedailysuppliestohelpthemout.M:Great.Idliketogoandhelp(Text10)Theplanetsclimatehasbeenchangingoveerthousandsofyears.Theglobalaveragetemperaturetodayisabout15^C.Hlowever,theplanetiswarmingfasterthaneverbefore.Ifthissituationcontinues,temperaturesmayriseby3-5^Cbytheyear2100.Weshouldtryandfixthissituationandpreventtheaverageglobaltemperaturefromrisingmorethan1.5^C.Becausea2^Crisewillbebadforusall.A2^Crrisewouldmeanthatallthereefswilldisappear18%oftheinsectsonEarthwilldisappear.And37%ofpeoplewillbeaffectedbydangerousheatwaves.Whetherit’sreefs,insects,orotherspecies,everythingisfarbetteroffinaworldthatlimitstherisetonomorethan1.5^C.Carbonhastobepulledoutoftheair.Billionsoftreeshavetobeplanted.Peopleshouldbuylessmeat.Ofallthefoodsweeat,beefhasthebiggestimpactonclimatechange.Becauseitreleasesalargeamountofgreenhousegasesthroughtheentireprocessofbeefproduction.Speakingofbeef,I’dliketoshareastoryaboutmyfriendJason.Heusedtolovesteaksomuchmuaspeveriectlie.WatershipDownmademeunderstandwhyweneedthemagicofstories,andwhyweshouldnever,everbeashamedofthat.–参考答案1-5CBBAA6-10CBACB11-15BAACA16-20CBABC21-25ABBDC31-35BCAAA26-30CDABCA36-40ADFG46-50DACDBE41-45ACBDC51-55DBABB5656.safely57.heroes59.did58.torelax60.a62.our61.helping