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下列不利于人体散热的是（ ）
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高三下学期生物《》真题及答案
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人体散热的方式有________________
人体散热的方式包括________________________________
砂轮中的空隙会造成堵塞不利于散热
试述人体散热的过程
人体散热的方式有对流和蒸发
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如图是2018年第一季度五省GDP情况图则下列描述中不正确的是
已知椭圆a＞b＞0的离心率为右焦点为F以原点O为圆心椭圆C的短半轴长为半径的圆与直线相切． 1求椭圆C的方程 2如图过定点P20的直线l交椭圆C于AB两点连接AF并延长交C于M求证∠PFM＝∠PFB．
假如你是新华中学的学生会__李华你校学生会应英国WestminsterSchool邀请暑假将到该校进行交流访问向该校学生介绍中国传统文化.请你给该校联系人Mr.Smith写一封邮件要点如下 1.感谢对方的邀请 2.询问食宿活动安排和说明要介绍的传统文化内容 3.祝愿交流活动成功. 注意1.词数100左右 2.可以适当增加细节以使行文连贯 3.开头和结尾已给出不计入总词数. DearMr.Smith IamLiHuachairmanoftheStudentUnionofXinHuaHighSchool. Yours LiHua
25℃时NaCN溶液中CN﹣HCN浓度所占分数δ随pH变化的关系如图甲所示．向10mL0.01mol•L﹣1NaCN溶液中逐滴加入0.01mol•L﹣1的盐酸其pH变化曲线如下图乙所示[其中a点的坐标为9.50.5]．下列溶液中的关系中一定正确的是
Thealarmsounds.Studentsswingtheirbackpackovertheirshouldersboardtheschoolbusmaketheirwaytotheirhomeroomandthebellrings﹣﹣schoolisback.ButformorehomesinAmericaschoollooksmorelikestudentswakingupmakingtheirwaytothediningroomorhomeofficesettinguplaptopsandlearninginthecomfortofhome. Virtual虚拟的schoolingdefinedasapublicschoolthatoffersonlyinstructioninwhichstudentsandteachersareseparatedbytimeand/orlocationandinteractionoccursviacomputersand/ortelecommunications电信technologies''hasincreasedoverthepastdecade.AccordingtotheNationalEducationPolicyCenterenrollments入学invirtualschoolsincreasedby17000studentsbetween2015﹣16and2016﹣17to295518students. ForArizonaVirtualAcademy.afullonlinepublicK﹣12charterschooltheyuseK12Inc.curriculum.K12servesstudentsinall50statesandmorethan100countrieswithdigitalleamingplatformsandtechnologyprovidingonlineeducation.Wealwaysareimprovingourplatformsandthetechnologythatweusetomakesurethatwe'rekeepingupwiththechangingtrendsnotonlywitheducationbutalsowithtechnology''Dr.KellyVanSandesaid.Anotherpieceofnewtechnologythey'verolledoutisanewappwhereparentscanfindvirtualschoolsavailableintheirarea. CarrieFaulknerchosetoenrolltwoofherchildreninArizonaVirtualAcademy.Shesaysthey'vedoneschoolingonlineinChicagoinCaliforniaatrestaurantsandonhercousin'sfloorinKansas.Itdoesn'tmatterwhetherhehersonisonthecouchinhisbedoratthekitchentable一hecandoschoolingwhereverhewantstoFaulknersaid.IwishtheyhaditformebackwhenIwasinschool.Thatwouldhavebeenawesome. 1What'sthepurposeofparagraph1? A.Togiveanexampleofvirtualschooling. B.Tointroducethetopicvirtualschooling C.Todescribevividlystudentsgoingtoschool. D.Tocomparerealschoolingwithvirtualschooling. 2Howmanystudentsenrolledvirtualschoolsduringthe2015﹣2016schoolyear? A.17000 B.147759 C.278518 D.295518 3WhatcanweinferaboutArizonaVirtualAcademy? A.Theyprovidebothonlineandofflineeducation. B.They'reintendedforstudentsintheUnitedStated. C.Theirnewappletspeoplefindschoolnationwide. D.Theirplatformsandtechnologyareveryadvanced. 4WhatisCarrieFaulkner'sattitudetovirtualschooling? A.Favorable B.Doubtful C.Indifferent D.Disapproving
由X在酸性条件下制备Y一种合成香料医药农药及染料的中间体的流程如图下列说法正确的是
已知数列{an}满足n∈N*则a25﹣a1＝．
Thedesiretosleeplatecanbealmosttoomuchtoresistatweekends.ThisSaturdaymorningthoughtherewassomethingimportantenoughtogetmeupearly.YawningwidelyIgotoutofbedandputonsomeoldjeansandaT﹣shirt.Aftercombingthehouseforworkglovesmydadcameupwithapairmymotherusedforgardeningandtookthemalong. Wehopped跳inthecarandheadedintoBoston.GuidedbymydirectionsDadwassomehowabletogetustoourdestinationarowoftwo﹣storyhouses.Theywereintheprocessofbeingbuiltmostlybyvolunteerslikeus. AftergrabbingahugeleathertoolbeltImetthepeopleIwouldbeworkingwith.VirginiaJamesandWilburwereallmorethantwicemyagebuttreatedmelikeapeer同龄人.Wegottoworknailingtheframesofwalls.BylunchbreakIhadhitwhatseemedlikeeverytoughspotinthewholehouseandpried撬起countlessbentnails.TherestofthedaywentbyquicklyasIgainedefficiencywithmyhammer.Soonitwastimetopackup. AsIwasleavingawomancameintothehouse.Shesawtheprogresswe'dmadeupstairsandstartedlookingaroundtherooms.ThenIrealizedwhothewomanwas﹣herfamilywouldbelivinginthehouse.AsshewalkedthrougheachroomIcouldseeherplanningwherefurniturewouldgo. EventhoughIhadonlybeenthereoneshortdayoutofweeksofconstructionIfeltagreatsenseofaccomplishment.Whenthesehouseswerefinishedsixfamilieswouldhavenicehomes. ThanksgotoHabitatforHumanityforgivingmesuchanopportunitytomakeadifferenceinotherslives.HabitatforHumanityisaninternationalorganization.Localinformationcanbefoundbyvisitingwwwhabitat.org.Youarewelcometojoinandbepartofthechangeyouwanttoseeinyourcommunity. 1WhatistheimportantthingtheauthormentionedinParagraph1? A.Sleepingatweekends. B.Gardeningwithhismother. C.Buildingsomehouses. D.Findinghisfatherapairofworkgloves. 2WhatcanbelearnedabouttheauthorfromParagraph3? A.Heworkedwithpeopleofhisage. B.Hewasanawkwardnaileratfirst. C.Hefinishedworkbefolunchbreak. D.Helearnedalotfromhisworkmates. 3Whichofthefollowingwordscanbestdescribetheauthor? A.Sensitive. B.Brave. C.Ambitious. D.Caring. 4Whatdoestheauthorintendtodointhelastparagraph? A.Callonmorepeopletovolunteer. B.Stresstheimportanceoflaborwork. C.Advertisealocalnonprofitorganization. D.IntroducethebenefitsofjoiningHabitatforHumanity.
复数z1＝3+2ii为虚数单位是方程z2﹣6z+b＝0b∈R的根则b＝
如图在直三棱柱ABC﹣A1B1C1中底面△ABC为等腰直角三角形AB＝BC＝2AA1＝3P为B1C1的中点Q为BB1的三等分点靠近B1点． Ⅰ求三棱锥P﹣AQC的体积 Ⅱ在线段A1C1上找点M使得B1M∥平面APQ写出作图步骤但不要求证明．
在直角坐标系xOy中曲线C1的参数方程为α为参数．P是曲线C1上的动点将线段OP绕O点顺时针旋转90°得到线段OQ设点Q的轨迹为曲线C2．以坐标原点O为极点x轴正半轴为极轴建立极坐标系． Ⅰ求曲线C1C2的极坐标方程 Ⅱ在Ⅰ的条件下若射线与曲线C1C2分别交于AB两点除极点外且有定点M40求△MAB面积．
已知△ABC点M是边BC的中点若点O满足则
双曲线a＞0b＞0A﹣t0Bt0t＞0斜率为的直线A点且与双曲线交于MN两点．若则双曲线的离心率为
下列基本操作正确的是
AftershoppingfordealsinstoresonBlackFridayoronlineonCyberMondayAmericansandpeopleworldwidearepreparingfornewlypopularGivingTuesday.Startingin2012nowtheglobaleventthatiscelebratedannuallyontheTuesdayafterThanksgivingisthebrainchildof92ndStreetYaculturalcenterinNewYorkCityandtheUnitedNationsFoundation. AsthenameindicatesGivingTuesdayismeanttorestartthecharitableseasonandthereforeobservedbyraisingfundsforlocalnonprofitsandschoolsorganizingfoodandclothingdrivesandconductingrandomactsofkindness.In2015700000peoplefrom71countriescametogethertodonate116.7millionincash.Anadditional1.08millionwasspentongifts. Whiletheeasiestwaytoparticipateisbydonatingtoyourfavoritecharitythisdaycanbecelebratedinmanyotherwaystoo.Youcangivebackbyvolunteeringatyourlocalshelterorfoodbankorevenbydonatingblood.Ifallelsefailsapurchasefromthegrowingnumberoforganizationsthatgiveaportionoftheirsalestocharitywilldothetrick. Butperhapsthebestwaytocelebratethedayisthosenearestanddearesttoyou.Assistafamilymemberwithasimplechorelikefoldinglaundrycookingdinnerorevenreadingtoayoungersibling.NomatterwhatyoudobesuretoshareyourgooddeedonsocialmediaandinspireotherstocelebrateGivingTuesdayaswell! 1Whichofthefollowinghastheshortesthistory? A.GivingTuesday. B.BlackFriday. C.ThanksgivingDay. D.CyberMonday. 2What'sthemainpurposeofGivingTuesday? A.TomakeThanksgivingDayenjoyable. B.Toencouragemorepeopletodocharities. C.Togetvoluntaryworkbetterknown. D.Topersuademorepeopletoshoponline. 3Whydoestheauthoradvisesharinggooddeedsonsocial? A.Tokeeparecordofone'sexperience. B.Tohelppeoplemakenewfriends. C.TomakeGivingTuesdaymorepopular. D.Todonatemoneytolocalschools. 4Whichsectionofawebsitedoesthetextprobablycome. A.Lifestyle. B.Education. C.Culture. D.Business.
已知集合A＝{x|﹣2＜x≤2}B＝{x|≤﹣1}则A∩B＝
如图先画一个正方形ABCD再将这个正方形各边的中点相连得到第2个正方形依此类推得到第4个正方形EFGH．在正方形ABCD内随机取一点则此点取自正方EFGH内的概率是
如图已知正方体ABCD﹣A1B1C1D1的棱长为4P是AA1的中点点M在侧面AA1B1B内若D1M⊥CP则△BCM面积的最小值为
假设你是红星中学高三学生李华.英国交换生Jim在给你的邮件中提到他对中国传统文化很感兴趣计划下学期参加相关社团他向你征询建议.请给他回邮件推荐你校的京剧社团.邮件内容包括 1.介绍京剧社团活动等 2.推荐的理由 3.建议他做准备简要了解京剧 4.词数100左右. 参考词汇京剧PekingOpera社闭community DearJim
YoursonhassufferedbraindamagethedoctortoldmymotherafterIwasbominthehospital.HewillneverwalkorspeakandI1youfindasuitableinstitutioninwhichtoplacehim/'Mom'sresponsewasastubborndeterminationtoprovehim2. Thenextyearshouldhavebeenoneoffirstsbutminecame3thanaverage.PhotosshowIamahealthychild.Whatyoucan't4aremom'seagerhandssupportingmefrombehind5Icouldn'tsitup.Althoughmyathletic6werelackingmycognitive认知的abilitiesconvincedherIwas7Mombegantoexercisemyarmsandlegs.8wasslowbutshecontinuedtrying.Severaltripstohospitalsdidn't9doctorsofanyprogress.Howeverallthenon﹣stopexercisepaidoff.At2Icouldsitupandmovearoundonmybehind10Istillcouldn'tcrawllikeababy.Apieceofequipmentwas11thestandingbox.Lockedintoanupright直立positionIscreamedfor12Momhadtoexplaintotheneighbors1wasn'tbeing13.AftereachtreatmentintheboxshewouldholdmeclosetellingmeIwouldsomeday14. Forsixmonthsusingtheequipmentwaspainfulbutit15.OnedayasIwascopyingthe16ofcartooncharactersIjumpedupandstartedrunningaroundtheroom.LaughingandjumpingaroundIcalledouttoMom.She17silentlyfromthekitchendoorwaynoddingwithtearsinhereyes.18.herlittlePatrickhaddefeatedtheexperts. ThenIwenttopreschoolhighschoolandcollegeand19aneditorofafamousmagazine. ThanksMom.The20youchosehasmadeallthedifference. 1A.promise B.order C.suggest D.beg 2A.honest B.wrong C.guilty D.silly 3A.slower B.higher C.heavier D.smaller 4A.miss B.control C.have D.see 5A.though B.if C.because D.until 6A.theories B.skills C.materials D.fuels 7A.important B.perfect C.normal D.patient 8A.Progress B.Result C.Process D.Time 9A.warn B.remind C.inform D.convince 10A.or B.yet C.so D.for 11A.stolen B.broken C.repaired D.added 12A.joy B.freedom C.food D.sleep 13A.abused B.accepted C.teased D.refused 14A.speak B.hear C.walk D.drive 15A.worked B.changed C.burnt D.stopped 16A.names B.voices C.faces D.actions 17A.watched B.listened C.read D.wrote 18A.Suddenly B.Quietly C.Strangely D.Finally 19A.visited B.became C.praised D.helped 20A.gift B.style C.road D.education
由含碘废水制取碘酸钾的一种工艺如图 1写出KIO3在日常生活中的一个重要应用． 2检验“含碘废水”中是否含有单质I2的常用试剂是写试剂名称． 3通入SO2的目的是将I2还原为I﹣该反应的离子方程式为． 4工艺中五种物质的制备反应中不涉及氧化还原反应的步骤是“制”． 5“制KIaq”时该温度下水的离子积为Kw＝1.0×10﹣13Ksp[FeOH2]＝9.0×10﹣15．为避免0.9mol•L﹣1FeI2溶液中Fe2+水解生成胶状物吸附I﹣起始加入K2CO3必须保持溶液的pH不大于． 6“制KIO3溶液”反应的离子方程式为． 7KClKIO3的溶解度曲线如图所示．流程中由“KIO3aq”得到KIO3晶体的操作步骤为．
若[x]表示不超过x的最大整数则图中的程序框图运行之后输出的结果为
Happinessistheonlytruemeasureofpersonalsuccess.Makingotherpeoplehappyisthehighestexpressionofsuccess.1Withthatinmindherearesomesuggestionsthatwillimmediatelyincreasetheamountofhappinessinyourlife 2 Ifthere'sanybigtruthaboutlifeit'sthatitusuallylivesuptoyourexpectations.ThereforewhenyourisefrombedmakeyourfirstthoughtSomethingwonderfulisgoingtohappentoday.Guesswhat?You'reprobablyright. Taketimetoplanandprioritize优先处理 Themostcommonsourceofstressisthethoughtthatyou'vegottoomuchworktodo.Ratherthanworryaboutitpickonethingthatwillmoveyouclosertoyourhighestgoalandpurposeinlife.Thendothatfirst. Eathighqualityfoodslowly 3Evensoatleastonceadaytrytoeatsomethingreallydeliciouslikeasmallchunkoffinecheeseoranimportedchocolate.Tasteitfocusonitandenjoyit. Letgoofyourresults Thebigenemyofhappinessisworrywhichcomesfromfocusingoneventsthatareoutsideyourcontrol.Onceyou'vetakenactionthere'susuallynothingmoreyoucando.4 Endeachdaywithgratitude Justbeforeyougotobedwritedownatleastonewonderfulthingthathappened.Itmightbesomethingassmallasmakingachildlaughorsomethingashugeasamilliondollardeal.5. A.Starteachdaywithexpectations. B.Giveagifttoeveryoneyoumeet. C.Focusonthejobathandratherthansomefantasythatmighthappen. D.Whateveritisbegratefulforthatdaybecauseitwillnevercomeagain. E.Sometimeswecan'tavoideatingsomethingquicklyandrunning. F.Thinkingaboutthatthingmakesyourheadhurt. G.It'simpossibletomakeothershappyifyou'renothappy.
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Λ.并在其下面写岀修改后的词. 删除把多余的词用斜线\划掉. 修改在错的词下面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 InmylifeIhavemetmanypeoplewhoreallyworthrecalling.ButperhapsthemostunforgettablepersonismyChineseteacher.Hegaveusthebestgifttheteachercanofferapassionforlearning.HenotonlytaughtmetoappreciatethebeautyofChineseliteraturebutalsoarouseourinterestinexploringsomethingdeeper.BesideIwasattractedbyhislivelyteachstyle.Wewerealwayslongingforhisclasswithgreateagerbecausehislectureswerehumorouslydelivered.FinallyIwasdeeplyimpressedbytherespectheshowedforusforhetreateduslikefriendratherthanstudents.SinceitisnearlytenyearssinceIattendedtohislastclassIknowpartofhimhasalreadystayedinmyheart.
“建设天蓝地绿水清的美丽中国”是每个中国人的愿望．下列做法与此相符的是
FuXueweia25﹣year﹣oldgirlfromChengduChina1recentsharedabeautifulsetofweddingphotosontheInternet.Howeverthere'sadebateonthephotographs2nogroom新郎seemstobefoundinthephotos.InfacttheonlypeoplefeaturedinthephotosareMs.Fuandher87﹣year﹣oldgrandfather. DespitehavingnoplansofgettingmarriedanytimesoonFudecided3weartheweddingdressforhergrandfather.ThemanfellseriouslyilllastSeptemberwithdoctorswarningthathecouldpassaway4anytime.5fearhemightnevergettofulfillthedreamofwalkingherdowntotheMr.RightFuarrangedthesurprisephotoshoot.Keepingherplansasecretshetook6shegrandfatherforaregularhospitalcheck﹣uponlytorevealthattheyweregoingtotakepictureslaterandheagreed. Ms.Fu7raisebyhergrandparentsfromtheageoften8makesthemmeanalottoher.Sheinsistsontakingcareoftheminreturn.Theyoungwomaneven9haveatattoo纹身ofhergrandfather.Ihadmygrandfather'sappearancetattooedonmyarmbecauseIwantallmynew10friendtoknowwhathelookslikeinthefutureshesaid.
若变量xy满足约束条件则z＝lny﹣lnx的最大值为
铜及其化合物在人们的日常生活中有着广泛的用途．回答下列问题 1铜或铜盐的焰色反应为绿色该光谱是填“吸收光谱”或“发射光谱”． 2基态Cu原子中核外电子占据的最低能层符号是其价电子层的电子排布式为Cu与Ag均属于IB族熔点CuAg填“＞”或“＜”． 3[CuNH34]SO4中阴离子的立体构型是中心原子的轨道杂化类型为[CuNH34]SO4中Cu2+与NH3之间形成的化学键称为． 4用Cu作催化剂可以氧化乙醇生成乙醛乙醛再被氧化成乙酸等物质的量的乙醛与乙酸中σ键的数目比为． 5氯铜两种元素的电负性如表 CuCl属于填“共价”或“离子”化合物． 6Cu与Cl形成某种化合物的晶胞如图所示该晶体的密度为ρg•cm﹣3晶胞边长为acm则阿伏加德罗常数为用含ρa的代数式表示相对原子质量Cu﹣64Cl﹣35.5．
已知函数若fa＝7a∈R则f﹣a＝．
NotriptoChicagoiscompletewithoutavisittotheArtInstitutewhichisthesecondlargestartmuseuminthenation. Openinghours Mon﹣Wed&Fri﹣Sun1030am﹣5pmThu1030am﹣8pmclosedonNewYear'sDayThanksgivingandChristmasDay. Highlights •TheModemWingcontainscontemporarymasterpiecesbyDaliMatisseMiroPicassoPollockandWarhol. •IntheCentralHallvisitorscanviewoneoftheworld'sfinestImpressionistcollectionsincludingmasterpiecesbyMonetDegasRenoirSeuratGauguinandVanGogh. •ThorneMiniatureRoomsofferadetailedviewofEuropeanhomesfromthe16thcenturythroughthe1930sandAmericanhomesfromthe17thcenturyto1940. •Thepastreturnsasover550worksfrom4000yearsofartcometogetherinOfGodsandGlamourlocatedinthebeautifulnewMaryandMichaelJaharisGalleriesofGreekRomanandByzantineArt. Adviceforvisitors •Freeguidedtoursareavailabledailyatnoon. •Freeart﹣makingactivitiesareavailableforchildreneachweekendfrom11amto2pm. •VisittheFamilyRoomintheRyanEducationCenteropendailyfrom1030am﹣5pmandintroduceyourchildtotheniuseuni'scollectionswithavarietyofhands﹣onactivities.Assemble组装puzzlesbasedonmasterpiecesyou'llseeinthegalleriesbuildarchitecturalwonderswithcolorfulblocksandlearnaboutartthroughstoriesandgamesatCuriousComer. •CheckouttheLion'sTrialtourforchildrenages5﹣10.Thistourisespeciallydesignedfortheyoungpeopleinyourgroup!Don'tmissit! Gettingthere Youcantakethefollowbuses13467142628126143. 1WhenisitsuitableforyoutovisittheArtInstitute? A.At330pmonThanksgivingDay. B.At830amonSaturday. C.At7pmonThursday. D.At10amonTuesday. 2WhoseworkscanvisitorsseeintheModemWing? A.Picasso. B.VanGogh. C.Monet. D.Seurat. 3WherecanyougoifyouwanttoseeEuropeanhomesinthe17th? A.TheFamilyRoom. B.ThorneMiniatureRooms. C.OfGodsandGlamour. D.TheModemWing. 4WhatcanchildrendoatCuriousComer? A.Holdabirthdayparty. B.JointheLion'sTrailtour. C.Communicatewithartists. D.Playwithcolorfulblocks.
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