首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
在平面直角坐标系xOy中，已知0＜α＜2π，点是角α终边上一点，则α的值是 ．
查看本题答案
包含此试题的试卷
高三下学期数学《》真题及答案
点击查看
你可能感兴趣的试题
在平面直角坐标系xOy中点在角α的终边上点Q.sin2θ－1在角β的终边上且＝－.1求cos2θ的值
在平面直角坐标系中已知角α的终边经过点P.3﹣2则tanα的值为.
在平面直角坐标系xOy中以Ox为始边角α的终边与单位圆O.的交点B.在第一象限已知A.－13.1若O
在平面直角坐标系xOy中已知点A.23在坐标轴上找一点P.使得△AOP是等腰三角形则这样的点P.共有
点203在空间直角坐标系中的位置是在
y轴上
xOy平面上
xOz平面上
yOz平面上
在平面直角坐标系xoy中四边形ABCD的边AB∥DCAD∥BC已知点A.－20B.68C.86则D.
在平面直角坐标系xoy中四边形ABCD的边AB∥DCAD∥BC已知点A.－20B.68C.86则D.
在平面直角坐标系xoy中已知点A.-22且OA=2在y轴上确定点P.使△AOP为等腰三角形则符合条件
有下列叙述①在空间直角坐标系中在x轴上的点的坐标一定可记为0bc②在空间直角坐标系中在y轴上的点的坐
如图所示在平面直角坐标系xOy中角α的终边与单位圆交于点A.点A.的纵坐标为则cosα＝____.
在平面直角坐标系xOy中四边形ABCD的边AB∥DCAD∥BC.已知A.－20B.68C.86则D.
如图所示在平面直角坐标系xOy中角α的终边与单位圆交于点A.点A.的纵坐标为则cosα＝______
在平面直角坐标系xOy中有点A21和点B若△AOB为等腰直角三角形则点B的坐标为.
在平面直角坐标系xOy中已知点A23在坐标轴上找一点P使得△AOP是等腰三角形则这样的点P共有个.
在平面直角坐标系xOy中四边形ABCD的边AB∥DCAD∥BC已知点A.－20B.68C.86则D.
在平面直角坐标系xOy中已知角α的终边经过点P4﹣3则2sinα+cosα=．
在直角坐标系xOy中若角α的始边为x轴的非负半轴终边为射线l.1求的值2若点P.Q.分别是角α始边终
在平面直角坐标系xOy中已知点A2﹣2在坐标轴上确定点P使△AOP为等腰三角形则符合条件的有个.
5
6
7
8
在平面直角坐标系xOy中已知点A.23在坐标轴上找一点P.使得△AOP是等腰三角形则这样的点P.共有
在平面直角坐标系xOy中已知点A23若将OA绕原点O逆时针旋转180°得到0A′则点A′在平面直角坐
第一象限
第二象限
第三象限
第四象限
热门试题
更多
已知向量的夹角为60°||=2||=4则-=
Childrenwhohavedevelopedleadershipskillsaresuretohaveabrightfuture.1Notonlywilltheygainmoreself-esteemandinteractmoreeasilywiththeirpeerstheycanalsomakeanimpactontheircommunity.Thesequalitieswillcontinuetodevelopaschildrengrowup.Herearesimpletechniquestodevelopchildren'sleadershipqualities. Discusspeerpressure.Childrenareoftenexposedtopeerpressureandworryabouthowothersviewthem2Leadershiprequiresbeingsociallyinvolvedbutstillhonoringpersonalmoralsandstandards.Discusshypothetical假设的peerpressuresituationsandaskkidstoconsiderhowthey'dbehaveindifferentsituations 3Whenthey'reabletoclearlyshowtheirthoughtstheyfeelmoreself-confidenttodealwithcomplexproblemsYoucanhelpbyencouragingchildrentospeakoutandbylisteningseriouslytotheirthoughts.Althoughmanychildrengothroughrebelliousstagesdon'tenforcesilence.Insteadsuggestself-expression. Teachbyexample.4Eveniftheydon'texpressitaloudchildrenmayseeyouasarolemodel.Modelleadershipbehaviorbyhelpingothersvolunteeringinleadershippositionsandtakingactionineverydaylife. Developchildren'sindividualtalentsandencourageparticipation.Everychildhaspotentialforleadershipskillsbutnoteverychilddevelopsskillsinthesameway.5Achildmightbeatalentedathleteorskilledatpaintinganddrawing.Findwaysforkidstodeveloptheseskillsinagroupsettingwhichpromotesteamworkandsocialskills. A.Encouragechildrentoexpressthemselves. B.Payattentiontospecificinterestsandabilities. C.Findvolunteerandcommunityserviceopportunities. D.Childrenstartbenefitingfromleadershipskillsatanyage E.Childrenwithself-awarenesshaveagreaterabilitytolead. F.Childrenobservetheadultsintheirlivesandvaluewhattheysee. G.Talkwithyourchildrenabouttheimportanceofavoidingpeerpressure.
ThehistoryofAustralianRulesFootball AustralianRulesFootballiscalledbymanynicknames.Loversofthegamejustcallitfootballorfooty.WhencontrastedwithotherformsoffootballitiscalledAussieRulesorAFL.AFLstandsforAustralianFootballLeaguewhichisthemostprestigiousleagueinAustralia. AustraliaRulesFootballwascreatedbyTomWillsin1858.Hewantedtocreateasportthatwouldkeepcricketplayersfitthroughthewinter.Hebeganbywritingaletterthatexplainedhispurposetoasportsmagazine.Italsocalledforthecreationofafootballclub.In1858WillsandothersplayedanexperimentalmatchthatwasthefirstgameofAustralianfootball.Butfewdetailsaboutthismatchhavesurvived. OnAugust71858twoimportanteventsforthegameoccurred.TheMelbourneFootballClubwasfounded.Itwasoneoftheworld'sfirstfootballclubsinanycode.AlsoafamousmatchbetweenMelbourneGrammarSchoolandScotchCollegewasplayed.Itwasumpired仲裁byTomWills.AseconddayofplaytookplaceonAugust21andthentherewasathirdandfinaldayonSeptember4.Thetwoschoolshavecompetedeveryyearsince. Thegameisplayedbetweentwoteamsof18playersonanovalthatcanalsobeusedforcricket.Theseplayingfieldscanbeupto185mlong.Thisisalmostfourtimesthesizeoffieldsusedinotherformsoffootball. Apointcalledabehindisscoredwhentheballgoesacrossthelineandbetweenagoalpostandabehindpost.Abehindpointisalsoscorediftheballistouchedbyanybodypartofeitherteam'smemberasitpassesbetweenthegoalposts.Agoalisworthsixpointsandabehindisworthonepoint. 1AccordingtoparagraphlallofthefollowingarenicknamesforAustralianRulesFootballEXCEPT. A.soccer B.footy C.AussieRules D.AFL 2AccordingtothepassageTomWillscreatedAustralianRulesFootballbecause. A.helikedcontributingtosportsmagazines B.hewantedtoumpireagamebetweenMelbourneGrammarandScotchCollege C.hewantedcricketplayerstokeephealthyduringthewinter D.hewantedtojointhemostprestigiousleagueinAustralia 3Theunderlinedphraseinanycodeinparagraph3isclosestinmeaningto. A.ofanyname B.inanyorder C.inanycountry D.ofanystyle
InhisbookIntentionalLivingauthorJohnMaxwellsharesthatbackin1976hereceivedagiftfromoneofhis1assist.Asheunwrappedthegifthesawthatitwasabook2nameTheGreatestStoryEverTold.Hecouldn'twait3readit. Butwhenheopenedthebookhewas4astonishtoseethatthepageswereblank.Insidethebookwas5notethatsaidJohnyourlifeisbeforeyou.Fillthesepageswithkindactsandgoodthoughtsofyourheart.Writeagreatstoryaboutyourlife.Theintentionofwritingthestoryofhislifeexcitedhim.Thenhe6begintowritehisbook. Everydayweliveoutourstorythroughourwordsactionsanddecisions.Butwemustremembertolivewithintentiontofocusonwhat7mattermostinlifeandtoregainthatfocuswhenwegetchanged.Withoutintentionwecanbecomeunfocusedinthings8needn'taddtoalifeofsignificanceanddifferenceinourworld. Lifeisn'tperfectandit'salwayshard9weneedremindersinourlifefromafriendauthorbloggerpastororourinnerspirittore-focususonthethingsthatmatterandmakeuslive10positive.
Haveyoueverrealizedthatthesmallestcountriesintheworldhavesomuchtooffer?Whetherit'shistoricandculturalheritageorunspoilednaturethesemicrostatesareworthavisit. Grenada Grenadaisasmallcountryintheworld.ItislocatedonislandofCaribbeanwhichisalsoknownasTheIslandofSpiceforseveralspiceslikecinnamongingerandrarenutmeg.Grenadareliesontourism.Itspristinebeacheswarmturquoisewaterandunspoilednaturemakeitawonderfulholidaydestination.Recentlyecotourismhasbeengrowingaswell. SanMarino LocatedwithinItalyandsurroundedbytheApennineMountains.SanMarinoisvisitedbyapproximately2milliontouristsannually.It'sabeautifulcountrywhichalsoclaimstobetheoldestsurvivingstateintheworld!Thereforeitsculturalandhistoricheritageisundoubtedlyfascinating.AlthoughverysmallthemicrostatehasalotofarchitecturalattractionsaswellastheRomagnawhichislovedbyItalianswhoareamongthemainguestshere. Maldives MaldivesislocatedonthebankofIndianOcean.Maldiveshasarangeofdifferenthabitatsincludingdeepseashallowcoastandreefecosystemsfringingmangroveswetlandsanddrylands.VisitorstotheMaldivesdonotneedtoapplyforapre-arrivalvisaregardlessoftheircountryoforiginprovidedtheyhaveavalidpassportproofofonwardtravelandthemoneytobeself-sufficientwhileinthecountry. Andorra It'sapicturesquemicrostatefoundinthePyreneesMountainsborderingSpainandFrance.Over10milliontouristsvisitAndorraeveryyear!Unliketheneighboringcountries'highpricesthecountryhasaduty-freepolicyallowingshopperstoenjoylowercosts.Alsotherearewinterandsummerresortssoyoucanvisitanytime. 1WhomightbeinterestedinGrenada? A.Architects. B.Spicelovers. C.Historians. D.Mountainclimbers. 2Whichofthefollowingisagoodchoiceforpeoplewholikebuildingdesign? A.Maldives. B.SanMarino. C.Andorra. D.Grenada. 3WhatisnotrequiredforatravelertoMaldives? A.Money. B.Apassport. C.Avisa. D.Areturnticket. 4WhatmeasurehasAndorratakentoattracttravelers? A.Offeringlowerprices. B.Adoptingvisa-freepolicy. C.Settingnaturalhabits. D.Developingscenicspot.
ArtificialintelligenceAItechnologymaysoonbeausefultoolfordoctors.Itmayhelpthembetterunderstandandtreatdiseaseslikebreastcancerinwaysthatwereneverbeforepossible. RishiRawatteachesAIattheUniversityofSouthernCalifornia'sUSCClinicalScienceCenterinLosAngeles.HeispartofateamofscientistswhoareresearchinghowAIandmachinelearningcanmoreeasilyrecognizecancerousgrowthsinthebreast.Rawatprovidesinformationaboutcancercellstoacomputer.Hesaysthisdatahelpsthemachinelearn.…Youcanputthedataintocomputersandtheywilllearnthepatternsandthepatternrecognitionisimportanttomakingdecisions. DavidAgusisanotherUSCresearcher.Hesaysmachinesarenotgoingtotaketheplaceofdoctors.Computerswillnottreatpatientsbuttheywillhelpmakecertaindecisionsandlookforthingsthatthehumanbraincan'trecognizebyitself.Onceaconfirmedcancerousgrowthisremoveddoctorsstillhavetotreatthepatienttoreducetheriskofcancerreturning.Theformoftreatmentdependsonthekindofcancer. Currentlyresearcherstakeathinpieceoftissueputitonasmallpieceofglassandaddcolortobetterseethecells.Thatprocesscouldtakedaysorevenlonger.Scientistssayartificialintelligencecandosomethingbetterthanjustcountcells.Throughmachinelearningitcanrecognizecomplexpatternsorstructuresandlearnhowthecellsareorganized. Thehopeisthatmachineswillsoonbeabletomakeaquickidentificationofcancerthatisfreeofhumanmistakes.Allofasuddenwehavethecomputingpowertoreallydoitinrealtime…Wecouldn'thavedonethiswedidn'thavethecomputingpowertodothisseveralyearsagobutnowit'sallchanged.Agusaddsthattheprocesscouldbedoneforalmostnocostinthedevelopingworld.Hesaysthathavingalargeamountofinformationaboutpatientsisimportantforamachinetoeffectivelydoitsjobinmedicine. TheUniversityofSouthernCaliforniaresearchersarenowonlystudyingbreastcancer.Butdoctorspredictartificialintelligencewillonedaymakeadifferenceinallformsofcancer. 1InRishiRawat'sresearch. A.thedataputintocomputerscontributestocancerrecognition B.manycancersarebeingstudiedatthemoment C.machinelearninghasreplaceddoctors'work D.thefocusisonthecureforcancer 2DavidAgus'swordsinParagraph3areusedto. A.providesomeadvicefordoctors B.introducethedevelopmentofcancer C.appealtoscientiststoresearchintocancer D.explainthefunctionofAIintreatingcancer 3Whatcanweinferfromthetext? A.AIcanmakedecisionsfordoctors. B.Developingcountriesmightbelackoffunds. C.AIwillhopefullymakeanaccurateidentificationofcancer. D.Computingpowerhaslonghelpedwiththeidentificationofcancer. 4Whatistheauthor'sattitudetowardsAIusedintreatingcancer? A.Positive. B.Indifferent. C.Doubtful. D.Negative.
等比数列{an}的各项均为正数a1=1a1+a2+a3=7则a3+a4+a5=
如图在四棱锥P-ABCD中BC∥ADAD=2BC点E是棱PD的中点PC与平面ABE交于F点设PF=λFC则λ=
已知集合A={x|≤3}集合B={x|x2≤9}则A∩B=
执行如图程序框图所示的程序若输出的x的值为9则输入的x为
在△ABC中角ABC所对的边分别为abc若2sin2A+csinC-sinA=2sin2B且△ABC的面积S=abc．则角B=．
我市高三年级第二次质量检测的数学成绩X近似服从正态分布N82σ2且P74＜X＜82=0.42．已知我市某校有800人参加此次考试据此估计该校数学成绩不低于90分的人数为
某地种植常规稻α和杂交稻β常规稻α的亩产稳定为485公斤今年单价为3.70元/公斤估计明年单价不变的可能性为10%变为3.90元/公斤的可能性为70%变为4.00的可能性为20%．统计杂交稻β的亩产数据得到亩产的频率分布直方图如图①．统计近10年杂交稻β的单价单位元/公斤与种植亩数单位万亩的关系得到的10组数据记为xiyii=12..10并得到散点图如图②． 1根据以上数据估计明年常规稻α的单价平均值 2在频率分布直方图中各组的取值按中间值来计算求杂交稻β的亩产平均值以频率作为概率预计将来三年中至少有二年杂交稻β的亩产超过795公斤的概率 3①判断杂交稻β的单价y单位元/公斤与种植亩数x单位万亩是否线性相关若相关试根据以下的参考数据求出y关于x的线性回归方程 ②调查得知明年此地杂交稻β的种植亩数预计为2万亩．若在常规稻α和杂交稻β中选择明年种植哪种水稻收入更高 统计参考数据=1.60=2.82xiyi=-0.52xi2=0.65 附线性回归方程=bx+ab=．
假定你是李华你的朋友Mike要来中国学习想在就读的学校附近租房子.现在你已经为他找好了房子请你给他回一封email向他介绍该房子的情况. 内容包括 1.房子基本情况位置大小设施及租金等 2.房东要求. 注意1.词数100左右 2.可以适当增加细节以使行文连贯. DearMike Yours LiHua
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.
已知球D的半径为3圆A与圆C为该球的两个小圆MN为圆A与圆C的公共弦MN=2若点B是弦MN的中点则四边形ABCD的面积的最大值为．
ThefirstorganizedsystemforsendingmessagesbeganinEgyptaround1500B.C.ThissystemdevelopedbecausethepharaohsfrequentlyneededtosendmessagesupanddowntheNileRiverinordertokeeptheirempirerunningsmoothly.LaterthePersiansdevelopedamoreefficientsystemforsendingmessagesusingmenandhorses.MessagescarriersrodealongtheroadsystemstretchingfromoneendofthePersianEmpiretotheother.Alongtheseroadsfreshmenandhorseswaitedatspecialstationstotakeandpassalonganymessagesthatneededtobesent.Thestationswhereriderspassedmessagesbackandforthwerebuilt23kilometersapartsothemenandhorseswereabletotravelquicklybetweenthem.TheRomanslatertookuphisideaandimproveditbyusingamoreadvancedandextensiveroadsystem. InChinahoweverKublaiKhanhadbuiltuphisownsystemfordeliveringmessages.ThissystemworkedinthesamebasicwayastheRomansystem.ThedifferencewasthatKublaiKhankept300000horsesalongtheroadsofthisdeliverylines.Therewereover10000stationswhereamessagewouldbepassedfromoneridertoanotherwithafreshhorse.InthiswayKublaiKhancouldreceivemessagesfromanywhereinthecountryinonlyafewdays. Itwasnotuntilthe1500sthatawell-organizedpostalsystemappearedagaininEurope.OnefamilythevonTaxisfamilygainedtherighttodelivermailfortheHolyRomanEmpireandpartsofSpain.ThisfamilycontinuedtocarrymailbothgovernmentandprivatethroughoutEuropeforalmost300years. In1653aFrenchmanRenouarddeVelayerestablishedasystemfordeliveringpostinParis.PostalchargesatthattimewerepaidbytherecipientbutdeVelayer'ssystemwasuniquebyallowingthesendertopre-paythechargesinasimilarwaytothemodernstamp.UnfortunatelydeVelayer'ssystemcametoanendwhenjealouscompetitorsputlivemiceinhisletterboxesruininghisbusiness.Eventuallygovernment-controlledpostalsystemstookoverfromprivatepostalbusinessesandbythe1700sgovernmentownershipofmostpostalsystemsinEuropewasanacceptedfactoflife. Thethingthatalltheseearlysystemshadincommonwasthattheywerequiteexpensiveforpublicuseandwereintendedforusebythegovernmentandthewealthy.Howeverin1840aBritishschoolteachernamedRolandHillsuggestedintroducingpostagestampsandapostalratebasedonweight.ThisresultedinloweringpostalratesencouragingmorepeopletousethesystemtostayintouchwitheachotherHisideahelpedtheBritishpostalsystembegintoearnprofitsasearlyas1850.SoonafterthatmanyothercountriestookupMr.Hill'sidea.Andletterwritingbecameaccessibletoanyonewhocouldwrite.TodaytheRolandHillawardsaregiveneachyeartoencourageandrewardfreshideaswhichhelppromotephilatelystampcollecting. 1Whatisthemaintopicofthepassage? A.Howinternationalletterstravel. B.Asurprisingmethodfordeliveringmail. C.Thehistoryofpostalsystems. D.Changesinthemethodsofcommunication. 2WhichofthefollowingstatementsaboutRenouarddeVelayeristrue? A.Hiswasagovernment-controlledsystem. B.Hiscompetitorsdestroyedhisbusiness. C.Hissystemlastedforhundredsofyears. D.Inhissystemthepersonwhoreceivedtheletterpaidthepostagefees. 3Whichofthesystemsmentionedinthepassagewasmostlikethepostalsystemtoday? A.Egyptian. B.Chinese. C.deVelayer's. D.vonTaxis's. 4WhatwasRolandHill'sgreatestachievement? A.Hemadeletterwritingaccessibletotheaverageperson. B.HemadealotofmoneyfortheBritishpostalsystem. C.Hemadestampcollectingapopularhobby. D.Hewonanawardforletterwriting.
假设你是王平.上周你刚买了一台电视机但你发现电视机有问题请你用英文给商店经理写一封信反馈问题.内容包括 1.电视机的问题所在 2.你希望的解决方法及联系方式. 注意 1.词数80词左右 2.可适当增加细节以使行文连贯 3.信件开头和结束已经给出不计入总字数. DearSirorMadam Iboughta37-inchTVsetfor﹩400inyourstoreon15thofthismonth.AsalesgirlnamedMaryservedmeandrecommendedthisbrand. YoursSincerely WangPing
若二项式x6n的展开式中含有常数项则n的值可以是
Myfatherwasahighlyeducatedintelligentgentleman.Hecoulddebateordiscussfor1onalmostanytopicandholdyourattentionintheprocess.Ithoughttherewas2hewasn'tabletodo. Afewdays3myyoungerbrother's7thbirthdayDadplannedtoputtogetherashinynew4asaspecialbirthdaysurprise.Afternearlyanhourof5theinstructionsDadwasstillunabletoputthenewbiketogether.Laterhefoldedupthepaperofinstructions6histoolboxanddecidedtotakethebikebacktothelocaltoystoreandpayextramoneytohaveit7assembled组装there.Thenan8cametohimashecalledouttoLovettthequietlittlemanwhomowedourgrassland. Lovetthaveyoueverassembledaboy'sbicycle?AsLovettwalkedtowardsthebikeDadhandedhimthepaperofinstructions.Lovetthandedit9tohimsayingNothanks.Ican'tread.Whenyoucan'treadyouhaveto10.Lessthan15minuteslaterthenewbicyclewasfullyassembledwithnospareparts11.DadshookLovett'shandpattedhimonthebackthankedhimandhidthebike. Onthenightaftermybrother12hisslm1ynewgift.Dadannouncedatthefamilydinnertable13hadhappenedseveraldaysearlier.Hetookgreatdelightintellingit14---heuseditasanexampleofthinking. Hedidnot15illiteracy文盲butstronglytaughtustouseour16.Thejokewasonmyfather17hewasabletotumitintoalearningtoolandIlikedhimeven18aftertheincident.IalsogainedarespectforLovett.Tomehehadalwaysbeentheoldyardmanwhodidn'tsaymuchbutafterthatdayheseemedtosmile19evenwalktaller.It'samazingwhatarealnodof20candotoliftpeopleup. 1A.minutes B.seconds C.hours D.years 2A.nothing B.everything C.something D.onething 3A.after B.ago C.before D.during 4A.toy B.car C.vehicle D.bike 5A.writing B.reading C.hearing D.explaining 6A.tookup B.pickedup C.heldup D.gaveup 7A.simply B.deliberately C.evidently D.correctly 8A.plot B.scene C.idea D.story 9A.back B.in C.out D.down 10A.quit B.stop C.argue D.think 11A.remaining B.remained C.spotted D.losing 12A.designed B.bought C.decorated D.received 13A.what B.that C.which D.why 14A.onceinawhile B.innotime C.fromthenon D.againandagain 15A.referto B.applyto C.relyon D.spyon 16A.hands B.heads C.mouths D.feet 17A.or B.and C.but D.because 18A.less B.worse C.more D.much 19A.larger B.happier C.luckier D.broader 20A.approval B.achievement C.judgment D.comfort
设集合A={x∈Z|x2≤1}B={-1012}则A∩B=
Nearly20U.S.stateshavestartedcarryingoutformerpresidentBarackObama'sCleanPowerPlanwhichplaceslimitsoncarbondioxideemissionsfrompowerplantsinanefforttoreducetheimpactsofclimatechange.Theplanhasbeeninlegallimbo边缘forthepastyear.Yetscientistshavenowcalculatedanotheroutcomeofthepolicyharmtocrop沁Ids产童iftheplaniscancelled.Alongwithcarbonpollutioncoal-firedpowerplantsspew喷出pollutantsthatformwhatweknowassmog.Thecontributionofsmogtoincreasedratesofasthma哮喘andprematuredeathswasalreadyknown.Thenewresearchestimatestheextenttowhichsmogunderair-pollutionpolicies-inplacebeforetheCleanPowerPlanwouldlimitproductionin2020offourmajorcropscomcottonpotatoesandsoybeans. LedbyenvironmentalengineerShannonL.CappsnowatDrexelUniversitytheteamalsosketchedtheextenttowhichthosecropproductionlosseswouldreduceunderthreenationwidescenarios方案.Oneimprovedtheefficiencyofindividualpowerplants.AnothermodeledapolicysimilartotheObamaplansettingstateCO2emissionsgoalsfortheelectricitydepartment.Athirdestablishedataxoncarbonemissionsunderwhichemissionsfellthemost.Butthegreatestdropinsmog-formingpollutants-andgreatestgainsincropyields-camefrompoliciessuchastheCleanPowerPlan. ResearcherscalculatedhowwelleachscenariowouldreducethepotentialproductivitylossPPLofeachcrop.PPLisaprojectedvaluefor2020andindicateshowmuchcropgrowthwouldsufferbecauseofsmog.Scenario2mostcloselyagreeswithresultsexpectedfromtheCleanPowerPlan. 1What'sthemainpurposeofTheCleanPowerPlan? A.Tooffercleanpower. B.TolimitCO2emissions. C.Toslowclimatechange. D.Toincreasecropproduction. 2Thelatestresearchshowsthatsmogmaycause. A.asthma B.earlydeaths C.heartdisease D.cropproductionloss 3WhatcanweinferfromParagraph2? A.Scenario3wasintendedtoincreasetaxes. B.Scenario2increasedcropyieldsmost. C.ScenarioIdidn'thaveanyeffectoncropyields. D.ThethreescenariosweremadeatDrexelUniversity. 4What'sthebesttitleofthepassage? A.U.S.statesrestarttheObama'sPlan. B.TheCleanPowerPlanwascalledoff. C.Threescenariosbenefitcropyields. D.Smogdoesharmtopeople'shealth.
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来写的以下作文.文中共有10处语言错误每句中最多有两处.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\划掉. 修改在错的词下画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. Haveyoueverhadheadacheduringatest?Haveyoueverbeentooconcernedaboutsomethingthatyouevencan'tsleepatnight?Ifsothenyouknowthatstressis.Toomuchstresscanresultinangrydepressionandotherrelatedproblemswhichweneedtotakethemseriously. Howevernotallstresswasharmfultoyou.Somekindsofstresscanhelpyougettingthingsdonebetterlikewhenyouarerunningtowardsthefinishinglineorwhenyouareaskingtodeliveraspeechtoyourclass.Stresssometimescanpushyoutomakefullpreparationsforatest. Thebestapproachofreducingstressistohaveabalancedlife.Ifyougetenoughsleepeatpropertakemoreexerciseandhaveenoughfuntimeyoumightfeellessstressed.
已知函数fx=x+过点10作曲线fx的两条切线切点为Ax1fx1Bx2fx2其中0＜x1＜x2．若在区间x1x2中存在唯一整数则a的取值范围是
It'sasadrealitythatmanyofusfindourselvesjusttoobusytocontributetoourcommunities. Foralongtime1toobelieveditcosttoomuchintimemoneyand1tomakearealdifference.ButallthatchangedwhenI2mygood-deed-a-dayproject. MydaughterEmilywasmyprimary3.Iwantedtoshowherwecoulddolittlethingstohelpothersandbe4. ThefirstweekIwasn'tsureifIcould5it.IsurfedtheInternetforideas.OnedayI6ablindmaninthesubwaystation.He7ashethankedme.AnotherdayIbroughtflowersfrommygardentoa8nursinghome…IcouldonlyhopeIwasarousing9inothers. Afterjustafewdays10IfounditeasierthanI'dexpected.IknewIwasmakinga/an11 EveryeveningatthedinnertableI12thatday'sgooddeedtoEmily.Emilybegan13whatI'dstarted.Onawalkhomefromschoolshe14toaneighbour'spotofgeraniums天竺葵whichhadtoppled摇晃inthewindandsetitright.Thatwasmygooddeedfortheday!sheyelled.Anotherdayshehelpedmecollect15fromourneighboursforthefoodbank.Wedroppedoffthefoodand16wedroveawayEmilyannounced17thatshewantedtoworkthereoneday. BythelastweekIknewI'dchanged.AtfirstIhadn'tbeenentirely18thatIcoulddoagooddeedeveryday.Nowitwaspracticallysecond19.IfeltagreaterresponsibilitytotakeactionwhenIsawaneed20lookingtheotherway.IfeltasthoughI'dawakenedsomehow. 1A.energy B.space C.wisdom D.salary 2A.stopped B.started C.forgot D.remembered 3A.donation B.expectation C.celebration D.inspiration 4A.lucky B.clever C.happy D.merciful 5A.get B.manage C.put D.appreciate 6A.watched B.waited C.guided D.ordered 7A.smiled B.sighed C.frowned D.jumped 8A.popular B.distant C.deserted D.local 9A.interest B.mercy C.awareness D.praise 10A.though B.besides C.therefore D.also 11A.discovery B.difference C.mistake D.fortune 12A.reminded B.pointed C.recalled D.described 13A.criticizing B.sharing C.laughing D.praising 14A.marchedover B.pulledover C.turnedover D.fellover 15A.money B.vegetables C.donations D.clothes 16A.before B.since C.until D.as 17A.proudly B.eagerly C.anxiously D.casually 18A.concerned B.convinced C.expected D.persuaded 19A.scene B.language C.nature D.skill 20A.bymeansof B.regardlessof C.aswellas D.insteadof
Howtopersuadepeople Convincingpeoplethatyourwayisthebestwayisoftenverydifficult-especiallywhenyou'renotquitesurewhythey'resayingno.Thetrickistogetthemwonderingwhythey'resayingno.1. —Understandhowtimingiseverything.Knowinghowtopersuadepeopleisn'tjustinwordsandbodylanguage-it'salsoinknowingtherighttimetotalktothem.2youwillmostlikelyachievefasterbetterresults. —Gettoknowthem.Alargepartofwhetherornotpersuasioniseffectiveisbasedonthegeneralrelationshipbetweenyouandyourclient/son/friend/employee.Ifyoudon'tknowthepersonwellit'svitaltostartbuildingthisrelationshipimmediately-findcommongroundassoonaspossible.Humansingeneralaremorefondofpeoplethataresimilartothem.3. —4.Peoplearemorepersuadedbyafastconfidenttalkerthanaccuracy.Thefasteryoutalkthelesstimeyourlistenerhastoprocesswhatyou'vesaidandquestionit.Youmaycreatethefeelingthatyoutrulygraspthesubjectbyrunningthroughthefactsatwarpspeedconfidentofthemall. —Createurgency.Inordertogetpeopletoactinthemomentyouhavetobeabletocreateasenseofurgency.5it'sunlikelythey'llchangetheirmindsinthefuture.Youmustpersuadepeopleinthepresentit'sallthatmatters. A.Talkfast B.Communicatewithothers C.Ifsomeoneisawareofthis D.Andwiththerighttricksyoucandoit E.Sofindparallelsandmakethemknown F.Ifthey'renotmotivatedenoughtowantwhateveryouhaverightnow G.Ifyouapproachpeoplewhentheyaremorerelaxedandopentodiscussion
Withthe1inventofpersonalcomputerstheInternetandcellphonespeoplenowhavemoreimmediateaccesstoothersandinformation2anytimeinhistory.Losingthataccesscanleadtodisconnectanxiety''3isapsychologicaltermusedtodescribethe4anxietyfeelingsthatpeopleexperiencewhentheyareunable5usetheircellphonesorcannotlogontotheInternet.Somepeople6affectbydisconnectanxietymaystarttofeelupsetwhen7cannotreachtheirfriendsonline.Othersgetreallyworriedwhentheyarenotabletorespondtoemergenciesandthismakesthemfeel8help.Stillothersaresodependentontheircellphonesthattheyarefrightenedofmissinganyphonecalls.CellphonesandtheInternet9becomethemostimportanttechnologicaltoolstothesepeoplewhocannotaffordtolive10thesethings.
如图在以P为顶点母线长为的圆锥中底面圆O的直径AB长为2C是圆O所在平面内一点且AC是圆O的切线连接BC交圆O于点D连接PDPC． 1求证平面PAC⊥平面PBC 2若E是PC的中点连接OEED当二面角B-PO-D的大小为120°时求平面PAC与平面DOE所成锐二面角的余弦值．
在平面直角坐标系xOy中曲线C的参数方程为α为参数直线l的参数方程为t为参数0≤β＜π以坐标原点O为极点x轴的非负半轴为极轴建立极坐标系． 1求曲线C的极坐标方程 2已知直线l与曲线C相交于AB两点且|OA|-|OB|=2求β．
FormostofherlifeSuanneLaqueur'spassionforstorytellingwasshownonthedancefloor. AlthoughLaqueurbeganwritingatayoungagedancingalwaystookcenterstage.ShemajoredindanceandtheateratAlfredUniversityandtaughtathermother'sdancestudioinCroton-on-HudsonNewYorkforyears.ButwhenhermotherwasreadytoretireandanopportunityopenedforLaqueurtotakeoverthestudiosherealizedshehadnointerestintakingonthebusinesssideofherartOwningastudioisalotofwork-financiallylogistically.Ilovetheteachingthechoreographing编舞thestagingbutIdidn'twanttoownit. YetLaqueur'sdisinterestinrunningthestudiochangedwhenshebecameaself-publishedauthor.Inthefallof2013shedecidedtopursueSelf-publishingasawayofsharingherfirstcompletednovelwithfriendsandfamily.Duringtheprocesssherealizedthatfollowinghertruepassion-tellingstoriesthroughwriting--madethebusinessoftheartworthwhileandowningthatbusinessmeantshecoulddirectherwritingcareerhowevershechose. Startingwithhersecondself-publishednovelshebeganinvestingmoretimeinmarketingandbuildingheraudience.Herinvestmentpaidoff.Since2014Laqueurnow49hasself-publishedsixnovelswhichcollectivelyhavehundredsofratingsandreviewsonGoodreads.Her2016novelAnExaltationofLarksstoletheshowatthe25thAnnualWriter'sDigestSelf-PublishedBookAwardstoppingmorethan2300entriestowinthegrandprize. YouhavetowritethemosttruthfulstorytoyouandIthinkself-publishingallowsthatfreedomshesays.Ifyouworkwithtraditionalpublishingit'smoreaboutwhat'smarketable.Therearetrade-offswhicheveryonewilltellyoubutbyself-publishingIhavecontrolofthebookIhavecontrolofthestoryandI'mcoolwiththat. 1FromParagraph2wecanlearnthatLaqueur• A.wantedtoownapublishinghouse B.didn'tliketeachingdancinginfact C.wasapart-timewriterwhenshewasyoung D.wasinterestedinrunninghermother'sstudio 2WhatmadeLaqueurchangeherattitudetobusiness? A.Hermother'spersuasion. B.Self-publishinghernovels. C.Thedesiretomakemoney. D.Herownpassiontowardart. 3WhichofthefollowingcanbestreplacethephrasestoletheshowinParagraph4? A.becameafailure. B.wasshowntopeople. C.gotalltheattention. D.wasaccidentallystolen. 4WhatcanbeinferredfromwhatLaqueur'ssaid? A.Sheenjoysthewayofself-publishing. B.Shewillneverusetraditionalpublishing. C.Traditionalpublishingonlyfocusesonthemarket. D.Self-publishingwillreplacetraditionalpublishing.
热门题库
更多
高一上学期英语
高一下学期化学
高一下学期物理
高三下学期数学
高三上学期数学
高一下学期英语
教案备课库
高一上学期生物
高一下学期生物
高二上学期数学
高二上学期物理
高二上学期英语
高二上学期生物
高二下学期数学
高二上学期化学
高二下学期物理
湘公网安备 43130202000226号