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函数f（x）=cosx的图象大致是（ ）
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高三下学期数学《》真题及答案
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5.00分将函数y=cos2x的图象向左平移个单位得到函数y=fx•sinx的图象则fx的表达式可以
f（x）=﹣2cosx
f（x）=2cosx
f（x）=
sin2x
f（x）=sin（2x+
）
已知函数y＝fx的导函数f′x的图象如图所示试画出函数y＝fx的大致图象.
现有四个函数①y=x•sinx②y=x•cosx③y=x•|cosx|④y=x•2x的图象部分如下则
①④③②
③④②①
④①②③
①④②③
设函数fx＝ax＋sinx＋cosx.若函数fx的图象上存在不同的两点A.B.使得曲线y＝fx在点A
已知函数fx=3sinx+2cosxgx=3sinx﹣2cosx若将函数fx的图象向右平移φ个单位后
函数fx=cosx的图象大致为
定义在区间[03π]上的函数y=sin2x的图象与y=cosx的图象的交点个数是.
已知函数fx=2cosxsinx+cosx则下列说法正确的是
f（x）的最小正周期为2π
f（x）的图象关于点
对称
f（x）的图象关于直线
对称
f（x）的图象向左平移
个单位长度后得到一个偶函数图象
若将函数fx＝sinx﹣2cosx的图象向左平移φ个单位得到函数gx＝sinx+2cosx的图象则
﹣
﹣
已知函数fx=sinx-cosx把函数fx的图象上每个点的横坐标扩大到原来的2倍再向右平移个单位长度
函数fx=2cosxx∈的图象大致为
已知a＝sinx－cosxb＝cosxcosx函数fx＝a·b＋.1求fx的最小正周期并求其图象对称
函数y=cosxx∈R的图象向右平移个单位后得到函数y=gx的图象则gx的解析式为
-sinx
sinx
-cosx
cosx
函数fx=•cosx的图象大致是
现有四个函数①y=x•sinx②y=x•cosx③y=x•|cosx|④y=x•2x的图象部分如下则
①④③②
④①②③
①④②③
③④②①
已知函y=fx定义在[-]上且其导函数的图象如图所示则函数y=fx可能是
y=sinx
y=-sinx·cosx
y=sinx·cosx
y=cosx
将函数y=fx的图象先向左平移个单位然后向上平移1个单位得到函数y=2cos2x的图象则fx﹣是
﹣sin2x
﹣2cosx
2sinx
2cosx
函数y＝fx的图象如图所示试画出导函数f′x图象的大致形状.
设函数fx＝ax＋sinx＋cosx.若函数fx的图象上存在不同的两点A.B.使得曲线y＝fx在点A
现有四个函数①y=x•sinx②y=x•cosx③y=x•|cosx|④y=x•2x的图象部分如下则
①④③②
③④②①
④①②③
①④②③
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AhutongisanancientcitystreettypicalinBeijing.1surroundtheForbiddenCitymanywerebuiltduringtheYuanMingandQing2dynasty.Inordertoestablishthestrongestpowerforemperorstheyplannedthecityandarrangedtheresidentialareas.3centerofthecityBeijingwastheroyalpalace﹣theForbiddenCity. AttheendoftheQingdynastyafter4closeChinacameunderinfluencefromabroadmanyoldhutongslost5theyformerneatarrangement. AfterthefoundingofthePeople'sRepublicofChinain1949hutongconditions6improve.Butinrecentyearsthehousesinmanyhutongshavebeenpulled7andreplacedbymodembuildings.Andthehutongtodayisfadingintotheshadefor8touristsandlocalpeople. HoweverintheurbandistrictofBeijinghousesalonghutongsstilloccupyone9threeofthetotalareaprovidinghousingforhalfpopulationsomanyhutongs10survive.InthisrespectweseetheoldinthenewinBeijingasanancientyetmoderncity.
ThatholidaymorningIdidn'thavetoattendschool.UsuallyonholidaysMother1Bmetosleepin.AndIwouldcertainlytakefulladvantageofit.Onthisparticularmorning2CIfeltlikegettingupearly. Istoodbymywindowoverlookingthe3Ahavingnothingbettertodo.ButasitturnedoutIwassoontolearnaboutsomething4Dinlife. AsIwatchedseveralpeoplegobygetintotheircarsanddriveoffI5Aanoldmanonabicyclewithabucketonits6Bandabasketofragsandbottlesonitsback﹣carriage.He7Cfromonecartoanotherwashingandcleaningthem.Fromthewateronthegrounditseemedthathehadalready8Dwashingandcleaningaboutadozenormorecars.Hemusthavebeguntoworkquiteearlyinthemorning. Severalthoughts9AmymindasIwatchedhimwork.Hewasn'twell﹣dressed.Hehadonapairofshortsandan10CT﹣shirt.Thebicycleherodewasnotbyanymeansthekindmodern11Dwouldwanttobeseenridingon.Butheseemed12Bwithlife.Therehewasworkinghardathissmallbusiness13Aatpassers﹣byandstoppingtochatnowandthen14Celderlymenandwomenontheirwaytothemarketnearby. Therewasanoticeabletouchof15Dinthewayheseemedtobedoingthings﹣16Athewindscreen挡风玻璃thenstandingbacktoadmireitscrubbing擦净thewheelsand17Cstandingbacktoseewhattheylookedlikeafterthescrub. Itwasa18Atolearn.Ifelt.Atnoageneedonehavetobegfora19Bifonehasgoodhealthandiswillingtoworkhard.ForawhileIfelt20Dofmyself.YoungasIam﹣justsixteenandtherewasthisoldmanwhomusthavebeenusefullyengagedperhapsbeforethesunappearedabovethehorizon. 1A.forces B.allows C.causes D.forbids 2A.otherwise B.therefore C.however D.besides 3A.parkinglot B.busstop C.school D.market 4A.interesting B.surprising C.awful D.useful 5A.noticed B.recognized C.called D.assisted 6A.back B.handle C.wheel D.seat 7A.searched B.left C.moved D.wandered 8A.stopped B.started C.intended D.finished 9A.crossed B.slipped C.disturbed D.inspired 10A.attractive B.shiny C.simple D.expensive 11A.repairmen B.businessmen C.drivers D.cyclists 12A.busy B.content C.careful D.bored 13A.waving B.looking C.laughing D.pointing 14A.about B.for C.with D.like 15A.worry B.respect C.sympathy D.pride 16A.cleaning B.fixing C.replacing D.covering 17A.still B.yet C.again D.soon 18A.lesson B.subject C.skill D.fact 19A.business B.living C.success D.right 20A.tired B.doubtful C.fearful D.ashamed
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下划一横线并在该词下面写出修改后的词. 注意1.每处错误及其修改均仅限一词; 2.只允许修改10处多者从第11处起不计分. DearKate Ihavegoodnewstotellyou.TheWorldAdolescentRoboticsCompetitionwillheldinShanghaiattheendofJuly.HearthatyouoncetookpartinthecompetitionlastyearandwonanawardIintendtoinviteyoutojoininourteaminthecomingcompetition.Iamsurethatyourinvolvementwillnotonlyhelpuswintheawardandalsostrengthenthefriendshipbetweenourschool. Nowtheyarepreparingforthecompetitionactively.BecauseyouhadmoreexperiencethanusIalsosendyouourtrainingplanaboutthatIwishtogetyouradvice.Wesincerehopethatwecanparticipateinacompetitionasteampartners. I'mlookingforwardtoyourreply. Yours LiHua
PeopleArePeople Globalizationhasbroughtdifferentculturestogetherinawayunimaginableonehundredyearsago.TodayChineseIndiansArabsAfricansAnglosandHispanicsmayallworkinthesameofficesattendthesameschoolsorliveinthesameneighborhoods.1Andoursocietyhaslatelyemphasizedtheimportanceofdiversity. 2Takethefollowingoldproverbsforexample. Honestyisthefirstchapterinthebookofwisdom.ThomasJeffersonAmericanPresident. Onefalsehoodspoilsathousandtruths.Africanproverb Behonesttothosewhoarehonestandbealsohonesttothosewhoarenothonest.LaoTzuChinesephilosopher. Asacrificeiswrittenoffbyalieandthemeritofdevotionbyanactofcheat.Hindusaying3Thereseemstobeasortofculturalunity. Wedon'twishtoimplyallculturesarethesame.Culturaldiversityisrealandpeoplefromdifferentculturesviewmanysituationsindifferentways.Howeverhistoricallydifferentculturesseemtosharemanycommonvalues.Theyarejusticecouragepatiencegenerosityequalitymercyandkindnessrespectfortheeldersandmanymore.Lyingandstealingappeartobewrongnomatterwhereyougo.Perhapssomeculturesmakeroomforextenuating情有可原circumstancesmorethanothersperhapsculturesapplythesevirtuesindifferentwaysandwhenvaluesdisagreedifferentculturesmayplacedifferentlevelsofimportanceonthem.4Butbothculturesmaystillvalueboth. Tousitseemsasifthereissomesortofcodeofrightandwrongthateveryoneeverywhereseemstounderstandregardlessofculture.Itisalmostasifbehindallofthediversityonefindsacommonunderstanding﹣ahumancultureifyouwill﹣thatgoesbeyondracialsocialandpoliticalboundaries.5. A.Eachvaluesupportsmanymorequotesfromdifferentcultures. B.Asculturesrubshoulderswitheachothermanydifferencesstandout. C.Thesequotesfromfourseparateculturesallsupportthesamevalue﹣honesty. D.Inotherwordsoneculturemayleanmoretowardjusticeandanotherculturemoretowardmercy. E.Itisalmostasifdespiteallourdifferencesweareallstillthesame﹣wearejustpeople. F.Wewanttoshowhoweverthatthereismoretotheseculturesthandiversity. G.Allpeopleseemtoagreethatweshouldtellthetruth.
假定你是李华.你的留学生朋友Tom以前成绩很优秀.但由于骄傲和懒惰最近他的成绩一落千丈.就此请你用英语给他写一封电子邮件内容包括 1.进行安慰 2.给出劝告不要骄傲不忘初心 3.具体建议努为复习制定学习计划. 注意 1.总词数100左右 2.可以适当增加细节以使行文连贯.
Youneverknowwhatnaturehaspreparedforyouasagift.YearsagowhenwalkingaloneonabeachinremotesouthwestFloridaIwasso1tohearsplashes水溅声comingfromthewater.AsIwalkedinthe2ofthesoundsIsawamanatee海牛showitsheadoutofthewater3agreatsnuffling带鼻音的breath.Itseemedthatitwasin4andtryingtogetoutofit. I'dneverseena5likethisbefore.Iwantedtoaskforhelpbuttherewasnoone6.SoIwentintotheshallowwaterandwenttowardtheanimal.Icame7enoughtomakeoutthemanatee.Thenasecondmanateemuchsmallerappearedbesideit.8theothermanateeswerealsomovingtowardme.SoonIwas9byseveralmanatees.Icouldclearlyseethelargermanatee10thelittleoneupwithherflipper鳍状肢andpushedittothesurfacebesideme. Asthetwoslippedunderwatertwoothermanateesmovedupfrombehindoneoneitherside11 gentlyagainstmybodyastheyswampast.Theycircledand12theactionthistime13bythemotherandherbaby.Iheldmyhandouttouchingtheirbackastheypassedme.SincetheyobviouslyenjoyedtouchingmeIbegan14eachofthemastheyswamby. Istoodthereenjoyingthescene15tomoveuntilfinallytherisingtide16mebacktotheshore.LaterIknewexactlywhattookplacethatmorning.ThemanateesinvolvedmeintheircelebrationofabirthandIwaswelcometomeetthe17memberoftheirfamily. DuringthatunexpectedsceneIfeltmoreinvolvedintherhythmsof18onourearththanever.EachyearIheadforthat19foraquietlittlebirthdaypicnicontheshore.Afterallyouneverknowwhomight20upforyourparty. 1A.frustrated B.surprised C.embarrassed D.disappointed 2A.direction B.condition C.middle D.side 3A.makingout B.puttingout C.comingout D.lettingout 4A.force B.trouble C.loss D.action 5A.look B.feel C.scene D.smell 6A.inhand B.insight C.intheway D.inthedistance 7A.close B.soon C.quick D.straight 8A.Luckily B.Personally C.Unexpectedly D.Sadly 9A.watched B.surrounded C.attacked D.separated 10A.turn B.eat C.throw D.hold 11A.rubbing B.preventing C.surfing D.comforting 12A.practiced B.changed C.repeated D.showed 13A.seen B.followed C.taught D.ordered 14A.moving B.hitting C.catching D.touching 15A.unwilling B.ready C.unable D.afraid 16A.invited B.forbade C.forced D.helped 17A.best B.oldest C.toughest D.newest 18A.life B.music C.world D.development 19A.boat B.hill C.beach D.manatee 20A.build B.show C.look D.step
Nexttimeyouneeddirectionsmaybeyoucanaskanant.Theselittlecreaturesaremastersofnavigation导航thatsomecanfindtheirwayhomewhetherthey'rewalkingforwardorbackwardaccordingtoastudyinCurrentBiology. Antsoftentravellongtobringbackthefoodtotheirnests.Buthowdotheyknowwherethey'regoing? ResearcherswenttoSpaintomesswithsomedesertants.Theyfoundanactivenestandsurroundeditwithbarriersthatforcedtheforaging搜寻antstofollowaparticularpathbackhome.Oncetheantswerefamiliarwiththemazetheresearcherswouldtakethemuphandthempiecesofacookieandthenputthembackinadifferentlocationonethatrequiredtakinga90degreeturntogettothenest. Theresearchfoundthattheantscarryingasmalleasy﹣to﹣carrypiecewouldrunforwardwithconfidenceandwereabletoheadonhome.Someantshoweverwoulddropthecookieandturnaroundtotakealookatthescenerywhichallowedthesix﹣leggedexpertstoresettheirinnermapscatchtheircookiesandheadintherightdirection. Theseantsseemtouseskyclueslikethepositionofthesuntokeepthemontrack.Whentheresearchersusedamirrortomakeitlooklikethesunontheothersideoftheskythecorneredantswouldturntailfortheoppositedirection. Soantsintegrate整合alotofinformationtosuccessfullybringhomethefood. 1WhatdoesthewordmazeinParagraph3probablyreferto?D A.Anestthatactiveantslivein. B.Anexperimentthatisdoneinthedesert. C.Amethodthathelpstolocatefood. D.Aplacethatconsistsofconfusingpaths. 2Whydidsomeantsstoptolookatthescenery?C A.Togetovertheman﹣madebarriers. B.Toenjoythesceneryalongtheroute. C.Toensurethey'reintherightdirection. D.Tocheckdirectionswiththeirmaps. 3Accordingtothepassagewhatprobablyhelpstheantsfindtheirwayhome?A A.Thepositionofthesun. B.Oneparticularpath. C.A90degreeturn. D.Piecesofacookie. 4Wheredoesthispassageprobablycomefrom?C A.Anadventurenovel. B.Ageographytextbook. C.Asciencemagazine. D.Atouristbrochure.
BritishpeopleworksomeofthelongesthoursinEuropebutareamongtheleastproductive.Nowsomecompaniesareshorteningtheworkingweektoincreaseefficiencyhealthandhappiness. RichLeighhasintroducedafour-dayweekathisPRcompany.InfacthisentirecompanyhasFridayoffbecausehisfirmhasadoptedafour-dayweek.ItisoneofahandfulofUKbusinessesthatnowoperatelikethisstaffstillgetpaidtheirpreviousfive-daysalarybuttheyworkadayless.Thecompanyfoundthattheyachievedjustasmuch-andtherewereevensighsofgrowth.Thekeytothescheme'ssuccessLeighsaysishowhappyouremployeesnoware. TheaverageBritishworkertakesonlya34minutelunchbreakandworks10hoursovertimeeachweekmoreoftenthannotthisisunpaid.YetUKproductivityfallsseriouslybehindtheirEuropeanneighborswhotendtoworkfewerhours. Britishworkingpracticeshavecausedlossanddamagetothenation'shealthandhappiness.MorethanhalfamillionworkersintheUKweresignedoffwithwork-relatedstressoranxietylastyear.Moreovertheworklandscapeitselfischanging.AutomationandAIwillhaveasignificantimpactonthelabormarketwhereunsteadyworkbecomesmorecommon. BritainistheonlyEUmemberthatallowsworkerstoignoretheEUworkingtimelimitandworklongerhours.Forcampaignersnowisthetimeforachange.O'Gradyanadvocatearguesthatwherebusinesseshaveincreasedtheirprofitsasaresultofautomationsuccessshouldbesharedwithworkersintheformofreducedhours.It'stimetosharethebenefitsfromnewtechnologynotallowingthoseatthetoptograbthemforthemselves.shesays. 1WecanlearnfromthepassagethatC. A.Britishpeoplearetheleastproductiveintheworld B.MostcompaniesinBritainhaveconductedafour-dayweek C.PRcompanyhaswitnessedariseinemployees'happiness D.Britishpeopleworklongerandgetmorepaymentthanothercountries 2WhichistheproperdescriptionofBritishworkingpractices?D A.TheworkingtimeofBritishworkersiswithintheEUlimit. B.IntermsofproductivityBritainisbeatenbytheUnitedStates. C.Profitsgainedfromnewtechnologyareonthedecrease. D.AutomationandAIarelikelytocauseaninstableworkmarket. 3WhichcanbeinferredfromO'GradyswordsintheInstparagraph?B A.It'stimeforemployerstosharetheincreasedprofitscreatedbyautomation. B.Workersshouldbenefitfromautomationintheformoflessworkinghours. C.Newtechnologyshouldbelongtobothbusinessesandworkers. D.Businessescan'tmakemoreprofitswithoutnewtechnology. 4Whatistheauthor'spurposeofwritingthepassage?A A.TointroducesomeBritishfirms'witchtoafour-dayworkingweek. B.ToexplainthereasonswhyBritishworkerssufferstressandanxiety. C.Toappealformorereasonableworkingconditions. D.TopresentthecurrentproductivityprobleminBritain.
CareerguidancespecialistsinJohnAdamsHighSchoolcanprovideinformationaboutCareer&TechnicalEducationclassesassistyouinmakingwisedecisionsforyourfutureandhelpyoufindopportunitiesincertificateprogramsapprenticeship学徒programsandfour﹣yearcollegesthatbestfityourneeds. Eachofthefollowingtwo﹣yearprogramsoffersthreehighschoolcreditspersemesterandrequiresaformalapplication. BusinessCooperativeExperiences Thisisaprogramforstudentswhohaveacareergoalinbusinessorofficework.Studentsspendoneperiodeachdaylearningadvancedskillsrelatedtothestudents'careerobjectiveinbusiness.Studentswillbeemployedatatrainingstationandwillworkeachweekatabusinessinthelocalcommunity. Importantfacts ●Computerapplications ●Workatotalof540hourstoearncredit ●Transportationnotprovided BusinessTechnologyLab Thisprogramwillpreparestudentsforcareersinbusinessandindustryandforworkingwithinteractivemedia.Studentswilllearnmultimediawebdesignandphotodesignskillsbyusingstate﹣of﹣the﹣art最先进的equipmentandsoftware.Thiscoursewillprovidestudentswiththetoolstoseekjobsorcontinuestudyingatapost﹣secondaryschool. Importantfacts ●AvailableatClayHighSchool ●Two─hourcourse Automotive汽车的ServicesTechnology Theprogramincludesclassroominstructionandlabactivitiesforthestudentstolearnentry﹣levelautomotiveskillsandbasicautomotiveoperationandservice.Studentswillgainskillsandtraininginautorepairthatcanleadtoentry﹣leveljobsorpost﹣secondaryeducation. Importantfacts ●ClassesheldatIvyTech ●Transportationprovided BuildingTradesTechnology Inthisprogramstudentsundertheleadershipofaqualifiedinstructorwillbuildahouse.Itgivesstudentsbasicskillsneededtoenterthebuildingtradesortocontinuestudyofconstructioninanapprenticeprogramorapost﹣secondaryschool. Importantfacts ●Three﹣hourcourse ●Transportationprovided ●Workbootsandhelmetneeded 1AnapplicantforBusinessTechnologyLabislikelytobeastudentwhoplans. A.tobeanequipmentprovider B.toworkatasecondaryschool C.todevelopgreatcomputerskills D.tobeadmittedintoauniversity 2Whichoftheprogramshassafetyrequirements? A.BusinessCooperativeExperiences B.BusinessTechnologyLab. C.AutomotiveServicesTechnology D.BuildingTradesTechnology 3Whatdothefourprogramsfocuson? A.Practicalskills B.Theoreticalstudy C.Businessplanning D.Managementability
ItisoneoftheliveliestfestivalsthathappeninBathanditisreturningthisSeptember.TheJaneAustenFestivalkicksoffonSeptember8andrunsfortendaysuntilSeptember17witheventsrunningeverydayandevening. Whataresomeofthefestivalhighlights? GrandRegencyCostumedCharityWalk Thehighlightisusuallythewalkwhichsees600ormorefansdressedinperioddressastheywalkfromRoyalCrescentLawnthroughthecitytoParadeGardens.ItisasplendidsighttoseeinthehistoricGeorgianstreets. WhenSaturdaySeptember9/1100am﹣1230pm WhereRoyalCrescentLawn Tickets£10peradult/FREEtowatch MrWickhamandaneveningwithJaneAusten JaneAusten'smostmemorablecharacterscometolifeattheOldTheatreRoyal.PerformancesincludethehandsomeWickhamAdrianLukis.PeriodmusicandatalkfromhistorianCatherineCurzonwillalsofeature. WhenSundaySeptember10/730pm﹣900pm WhereTheMasonicHallOldTheatreRoyal RegencyDanceWorkshops Thereisnothinglikedancing.Afterall.Iconsideritasoneofthefirstrefinementsofpolishedsocieties…Joininonthefun.Costumesarewelcomebutnotnecessary! WhenThursdaySeptember14/Beginners1030am﹣1200pm/Improvers130pm﹣300pm WhereAssemblyRooms Tickets£15 Arethereanyfreeevents? Yes. AReadingofNorthangerAbbey.Thenovelwillbereadaloudthroughoutthefestival.SectionsofAusten'sfirstnovelaresetinBathandyoucanstillfindthelocationsmentioned! WhenEverydayfromSept.10﹣Sept.17from200pm﹣300pm WhereWaterstonesbookshopMilsomStreetupstairs 1Whatdoestheauthorsayaboutthefestival? A.Itisinhonorofanovel. B.ItstartsonSeptember8. C.ItisheldbeyondBath. D.Itisintendedforthelocals. 2Whereshouldpeoplewearspecialcostumestoattendanevent? A.RoyalCrescentLawn. B.TheMasonicHall C.AssemblyRooms. D.Waterstonesbookshop. 3Whichofthefollowingchargesnomoney? A.JoiningintheGrandRegencyCostumedCharityWalk. B.Attendingalecturefromahistorian. C.GettingAusten'snovelinabookshop. D.Enjoyingthepublicreadingofanovel.
假定你是李华你们班级的节目哈姆雷特Hamlet将参加下个月学校英语文化节话剧drama比赛你给度假中的外教Mr.Hurst写一封电子邮件并附上节目录像请他给予你相关的指导. 注意 1词数100左右 2可适当增加细节以使行文连贯 3邮件的开头和结尾已为你写好. DearMr.Hurst Yours LiHua.
RussGremelnow98yearsolddecideditwastimetodonate﹩2milliontotheIllinoisAudubonSocietyacharity慈善机构topurchasenearly400acresoflandforwildlifeprotection.Gremelwasabletomakethisamazingdonationbecausehepurchased﹩1000worthofWalgreensstock股票sevendecadesagowhosevaluehasgrownrecently. AsinglemanwithnokidsGremelhaslivedinthesameChicagohousefor95yearsandhasalwayslivedsimplyneighborPatrickFalsotoldTODAY.FalsosaidheheardGremelsaymanytimesthemoneywasn'tminetobeginwithandthathealwaysintendedtogiveitaway. TheGremelWildlifeshelterwasfoundedonJune4.IllinoisAudubonSocietypresidentJimHerkertsaidGremel'sdonationwasextremelygenerous.It'sallowingustoprotectareallyvaluableandimportantpossessionandrealizeoneofGremel'swishesthatwecouldfindaplacewherepeoplecouldcomeoutandexperiencenaturethewayhedidasakidHerkerttoldTODAY. AfterdoingallthisthispastweekendGremeladoptedanoldChihuahua吉娃娃犬.Winniethedogwaspickedupasahomelessdogseveralmonthsago.Shesufferedfromakindofcancerwhichwastreated﹣andallsheneededwasalovinghomewhichColleenCollinsthefounderofPerfectPoochesAdoptionAgencywasdeterminedtofind. GremelhadlosthisownbelovedChihuahuaearlierthisyear.WhenhereachedouttoCollinsaboutWinnieshefeltthiscouldbeagoodmatch.ThatfeelinggrewwhenshebroughtWinnietohishouseforameetandgreetandWinniewasintroducednotonlytoGremelbutalsosomeofhisfriendsandneighbors.Onehadbroughtoveralotoffreshstrawberriesallsaidthey'dbetheretohelpoutinanywayneeded. 1PatrickFalsoismentionedinthetextmainlytoexplainC. A.howGremelearnedthemoney B.whatkindofpersonGremelis C.whyGremelmadethedonation D.whereGremelhasbeenliving 2WhatcanwelearnaboutRussGremelfromthetext?B A.Heraisedmanypetdogsinhislife. B.HeboughtWalgreensstockatage28. C.HeadoptedayoungChihuahuarecently. D.Hevolunteeredinwildlifesheltersregularly. 3WhatcanweinferaboutGremel'sneighborsfromthetext?D A.Theyliveinharmonywithanimals. B.TheyareimpressedwithdogWinnie. C.Theyleadahealthyandwealthylife. D.Theyarecaringandkindtoeachother.
Foodisextremelyimportanttoushumanbeingsandriceisoneofthemainfoodintheworld.Australianresearchershavediscoveredawaytogeneticallyengineerricewhichwouldprovidesignificanthealthbenefitstomorethanhalftheworld'spopulation. AstudyundertakenattheUniversityofTasmaniapublishedinarespectedjournaloftheNationalAcademyofSciencesdiscoveredamethodtoincreasetheresistantstarch抗性淀粉contentinricemakingitmoredigestibleandleadingtolowerrateofdiabetes糖尿病andoverweight. StevenSmiththeleadauthorofthestudyandaforeignexpertfortheChinesegovernmentwhohasbeenappointedtoworkoncropimprovementprojectsbytheChineseAcademyofSciencessaidincreasingthehigherresistantstarchcontentgavethisdesignerricemanyaddedhealthbenefits.WehavediscoveredthatwecanincreasetheamountofresistantstarchincookedricewhichcouldprovidehealthbenefitsforalargenumberofpeopleinAsiaandbeyondSmithsaidinamediareleaseonFriday.Thesameapproachcanbeadaptedforuseinothercerealsincludingwheat.Notonlycanithavebenefitsfordiabetesandobesitybutalsofordisordersofthebowel肠includingcancer. Riceisthemainfoodformorethanhalftheworld'spopulationprovidingmuchoftheworldwithmostoftheircalories.SmithsaidthatastherateofdiabetesandobesityinAsiancountriescontinuedtogrowhisdesignerricecouldprovideawaytolimithealthproblems. Notonlydoesresistantstarchreducethepossibilityofa‘sugarhit'butitalsoreducestheappetiteandpromotesthegrowthofthehealthygerms.Smithsaid. SmithdivideshistimebetweentheUniversityofTasmaniaandhisresearchlabinBeijingwherehehopestomakesignificantadvanceinsustainable可持续的living. 1Whatdoweknowaboutthestudy? A.ItispartofChinesecropimprovementprojects. B.Itwillhaveasignificanteffectoncropresearches. C.Itwasjointly联合地carriedoutbyAustraliaandChina. D.Ithelpssolvethefoodproblemforoverhalfoftheworld'spopulation. 2Basedonthetexttheresistantstarch. A.existsinlargeamountsincookedrice B.decreasesthepossibilityofasugarhitandprovidesmorecalories C.ishelpfulindigestionandlowerstherateofoverweightanddiabetes D.increasespeople'sappetiteandimprovesthegrowthofhealthygerms 3TheunderlinedworditinParagraph3refersto. A.resistantstarch B.cookedrice C.theapproach D.mediarelease 4Wheredoesthistextprobablycomefrom? A.Anenvironmentalreport. B.Amedicaljournal. C.Anengineeringtextbook. D.Anagriculturalmagazine.
在某单位的职工食堂中食堂每天以3元/个的价格从面包店购进面包然后以5元/个的价格出售．如果当天卖不完剩下的面包以1元/个的价格全部卖给饲料加工厂．根据以往统计资料得到食堂每天面包需求量的频率分布直方图如下图所示．食堂某天购进了80个面包以x单位个60≤x≤110表示面包的需求量T单位元表示利润． Ⅰ求T关于x的函数解析式 Ⅱ根据直方图估计利润T不少于100元的概率．
OnedaywhenIwas15yearsoldIhadsomefriendsovertohangout.Whileweweremakingfoodinthekitchenmybrothercamein.Heplacedhisbeefnexttomy1ConeandsaidCourtneyyourbeefisbiggerthanmine.Youdon'tneedto2B;you'realreadyfatenough.Thenhewalkedoutlaughing. Unpleasant3Donmyphysicalappearancewerenothingnew.Somethinginsidemegaveintohisideathatmylegswere4BandthatbecamethelastdaythatIeverwillinglywore5AuntilIwas30yearsold.Forthenext15yearsIspentsummeraftersummer6Binlongpants. ButthenImetRagenChastainandshe7Aeverything.Icouldn'tbelievethatthiswomanwholikemyselfweighedalmost300poundswasso8Dandhappyinherownskin.I9Dasshesharedherownjourneytorecoveryandself-love.Shetalkedabouthowamazingour10Caresimplybecauseofthethingstheydoeveryday-likebreathing11Dbloodtoeverycellblinkingandwalking. Walking!Iwassuddenly12ChowfoolishI'dbeenforsolong.There'repeoplewhoarebornwithoutlegsorwholack13AworkinglegsorwholosetheirlegsandI'dbeenhidingmyperfectlystronghealthybeautifullegs14AbecauseIhad15Bsomeonetoconvincemethattheyweren'tgoodenough.ThenextdayIboughtthreepairsofshortsandasundressandspenttheentiresummerlettingmylegs16Bthesunandfeelthebreeze. Thenexttimeanyonecommentsonyourbodyina17DwaylookthemstraightintheeyesmileandsayIfwhatyousee18Cyousomuchfeelfreetopracticetheancientartoflooking19Aelse.That'sRagen'sown20CbutIdon'tthinkshe'llmindifyouuseit. 1A.small B.plain C.thick D.slim 2A.walk B.eat C.talk D.cry 3A.reports B.suggestion C.reflections D.comments 4A.unnecessary B.unacceptable C.unique D.unhealthy 5A.shorts B.T-shirts C.socks D.pants 6A.sleeping B.roasting C.driving D.running 7A.changed B.solved C.believed D.explained 8A.sensitive B.generous C.tiresome D.energetic 9A.laughed B.expected C.waited D.listened 10A.legs B.weights C.bodies D.images 11A.pulling B.putting C.preventing D.pumping 12A.afraidof B.absorbedin C.awareof D.anxiousabout 13A.properly B.regularly C.accidentally D.possibly 14A.inshame B.inpanic C.inpride D.indelight 15A.begged B.allowed C.refused D.invited 16A.avoid B.see C.cover D.kick 17A.normal B.special C.different D.negative 18A.amuses B.excites C.bothers D.hurts 19A.somewhere B.anywhere C.nowhere D.everywhere 20A.decision B.question C.creation D.requirement
TianHaisuaChineseartistwhousesrollerskatestocreatetraditionalChineselandscapepaintings1sayshewantstogivethetraditionalformofpaintinganewleaseoflife.TocreatetheseuniquepaintingsTianusesa2modifypairofskateswithapolofblackpaintattachedtothewheels.Sheputs3onandskatesindeliberatepatternsoveralargecanvas.Iamsopassionateaboutinklandscapingbecauseitshowsveryrichemotionsbymeansofsimpleforms.shesaid. Tianreceivedherfirstbigbreakattheageof184oneofherartworks5displayduringtheOlympicsheldinChina.SincethenshehasexhibitedacrossChinaandtheUS. Her6latepaintingBlood﹣Lane﹣Lineis7currentondisplayattheCaliforniaCollegeofArts.8measure43feettall920feetwideithasbeendeliberatelyhungsothatthetophalfisonawallandthebottomhalfflowsontothefloor.Herintentionsheexplainsistogivethe10impressthatheavenandeartharefilledwiththeartistryofhercreations.
Modemlifeismakinguslonelierandrecentresearchindicatesthatthismaybethenextbiggestpublichealthissuefollowingobesityandsubstanceabuse.1Changesinmodemsocietyareconsideredtobethecause.Weliveinnuclearfamilyunitsoftenlivinglargedistancesawayfromourextendedfamilyandfriendsandourgrowingrelianceonsocialtechnologyratherthanface﹣to﹣faceinteractionisthoughttobemakingusfeelmoreisolated孤立的. 2Relocatingtoanewarealosingalovedoneandstartingacourseatuniversityareallkeytimeswhenpeoplefeellonely.Somepeoplebelievethisexperienceoflonelinessmotivatesustoreconnectwithothersandtoseekoutnewfriendshipstoreducethesocialpainthatwefeel.3Butforsomewhenreconnectionisnoteasyornotpossibleandapersonissociallyisolatedhecanremaininthisuncomfortablelonelinessstateforanumberofyearswhichislinkedtopoormentalhealth. Thereareanumberofmisunderstandingsregardingthosewhoexperienceloneliness.Certainlyallofusfeelitfromtimetotime.4Theymaybesociallyisolatedduetodecreasedmobilityandlossoffriendsandpartners.Butitisnotoftenacknowledgedthatlonelinessalsoaffectspeopleatallagesincludingchildrenandisparticularlycommonintheteenageyears. Anothermyth谬见isthatlonelinessistypicallyassociatedwithbeingalonebutitalsoaffectspeoplewhentheyaresurroundedbyothersandwellconnectedsocially.5 A.Theythinkitisusefultous. B.Sowhyarewegettinglonelier? C.Lonelinessaffectsallofusatsomepointinourlives. D.Buthowonearthcanwegetridofthisupsettingfriend? E.Lonelinessalmostaccompaniesusallthetimeandeverywhere. F.Butitiscommonlyknownthatlonelinessparticularlyaffectstheelderly. G.Thisisbecauselonelinessisaboutthequalitynotthequantityofrelationships.
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sin2x f（x）=sin（2x+
）
对称 f（x）的图象关于直线
对称 f（x）的图象向左平移
个单位长度后得到一个偶函数图象
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