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计算下列各题直接写结果 53°25′28″×5
用甲乙两种培养基对某细菌进行培养得结果如下表检验两种方法的培养结果有无差别可选用的最适当方法是
完全随机设计
2
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配对设计X
2
检验
配对设计校正X
2
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完全随机设计校正X
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直接计算概率法
三相对称电路分析计算可以归结为一相电路计算其他两相可依次滞后120°直接写 出
计算直接写出结果－7--4=_____
计算x-lx+2的结果是
计算直接写结果x²·x²³÷x5=
13分如图1正方形AEGH的顶点E.H.在正方形ABCD的边上直接写出HD∶GC∶EB的结果不必写计
定义一种新运算*a*b=2a－b比如2*－3=2×2－－3=7.1直接写出－3*2的结果是2若3*x
间接费以直接费为计算基时正确的计算公式应该是间接费＝
直接费中的人工费合计X间接费费率
直接费合计X间接费费率
直接费中的机械费合计X间接费费率
直接费中的人工费和机械费合计X间接费费率
DR的中文全称是
计算机X线摄影
直接数字化计算机X线摄影
间接数字化计算机X线摄影
直接数字平板X线成像系统
X线电子计算机断层扫描
1如图1菱形AEGH的顶点EH在菱形ABCD的边上且∠BAD=60°请直接写出HDGCEB的结果不
计算2x3-3x2y-2xy2-x3-2xy2＋y3＋-x3＋3x2y-y3的值其中x=0.5y=-
计算下列各题直接写结果 54°20′÷6
在计算机系统中CPU可以直接读/写中的内容
光盘
ROM
硬盘
RAM
辅助生产费用分配的直接分配法具有特点.
核算简便
核算工作复杂
计算结果准确
计算结果不够准确
计算并观察下列各式x-1x+1=______x-1x2+x+1=______x-1x3+x2+x+1
若A.x1y1B.x2y2是函数y=x2-4x+3图象上的两点且x1
计算直接写出结果4.5＋－4.5=_______
若有语句READ8REC=6ERR=10BWRITE86XY则关于它们的描述其中哪一条描述是正确的?
直接有格式读，顺序有格式写
直接无格式读，直接无格式写
顺序有格式读，顺序无格式写
直接无格式读，顺序有格式写
计算x2∙x的结果等于__________.
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如图多面体ABCDEF中底面ABCD是菱形∠BCD＝60°四边形BDEF是正方形且DE⊥平面ABCD． Ⅰ求证CF∥平面ADE Ⅱ若AE＝求多面体ABCDEF的体积V．
在边长为4的正方形ABCD中AC与BD相交于O．减去△AOB将剩下部分沿OCOD折叠使OAOB重合则以ABCDO为顶点的四面体的体积为
设则f7的值为．
已知向量则“x＝﹣2”是“与反向”的
某小组同学在实验室研究Al与CuCl2溶液的反应． 1现象ⅰ中的红色物质是． 2经检验现象ⅱ中的无色气体为氢气． ①甲认为Al与H+反应产生了氢气用离子方程式表示溶液中存在大量H+的原因． ②氢气从红色物质表面逸出的原因是． 3探究白色沉淀的化学成分． 查阅资料Cu+可与浓氨水反应生成CuNH32+无色该无色物质在空气中易被氧化变为蓝色． 乙认为白色沉淀可能是CuCl并通过实验证明其猜测正确实验步骤如下 a．取白色沉淀充分洗涤 b．向其中加入浓氨水沉淀溶解得到无色溶液将无色溶液分为两份 c．取其中一份无色溶液… d．将另一份无色溶液放置于空气中一段时间后溶液变为蓝色． ①步骤c的实验方案是． ②用化学平衡移动原理解释CuCl溶于浓氨水的原因． 4探究CuCl产生的原因． ①丙猜测可能是Cu与CuCl2溶液反应生成了CuCl因为Cu具有性． ②取Cu粉与1mol/LCuCl2溶液混合无白色沉淀产生丙再次分析Al与CuCl2溶液反应的实验现象改进实验方案证明了Cu与CuCl2溶液反应生成了CuCl改进之处是．
已知双曲线的焦距为10点P12在C的渐近线上则C的方程为
屠呦呦1971年发现分离提纯并用于治疟新药“青蒿素”拯救了数千万人的生命．青蒿素分子结构如图．下列说法错误的是
已知函数．y＝fx的部分图象如图所示PQ分别为该图象的最高点和最低点点PR垂x轴于RR的坐标为10若∠PRQ＝则f0＝
如图在正方体ABCD﹣A1B1C1D1中MN分别是BC1CD1的中点则下列说法错误的是
下列函数在区间0+∞上为增函数的是
设log34•log48•log8m＝log416则m的值是
设集合U＝{012345}A＝{123}B＝{x∈Z|x2﹣5x+4≥0}则A∩∁UB＝
What'sOn? ElectricUnderground 7.30pm﹣1.00amFreeattheCyclopsTheatre Doyouknowwho'splayinginyourarea?We'rebringingyouaneveningofliverockandpopmusicfromthebestlocalbands.Areyouinterestedinbecomingamusicianandgettingarecordingcontract合同?Ifsocomeearlytothetalkat7.30pmbyJulesSkyeasuccessfulrecordproducer.He'sgoingtotalkabouthowyoucanfindtherightpersontoproduceyoumusic. GeeWhizz 8.30pm﹣10.30pmComedyatKaleidoscope ComeandseeGeeWhizzperform.He'sthefunnieststand﹣upcomedianonthecomedyscene.Thisjoyfulshowwillpleaseeveryonefromtheyoungesttotheoldest.GeeWhizzreallyknowshowtomakeyoulaugh!Ourbarisopenfrom7.00pmfordrinksandsnacks快餐. Simon'sWorkshop 5.00pm﹣7.30pmWednesdaysatVictoriaStage Thisisagoodchanceforanyonewhowantstolearnhowtodocomedy.Theworkshoplooksateverykindofcomedyandpracticesmanydifferentwaysofmakingpeoplelaugh.Simonisacomedianandactorwhohas10years'experienceofteachingcomedy.Hisworkshopsareexcitingandfun.AneveningwithSimonwillgiveyoutheconfidencetobefunny. CharlotteStone 8.00pm﹣11.00pmPizzaWorld Finefoodwithbeautifuljazzmusic;thisisagreateveningout.CharlotteStonewillperformsongsfromhernewbest﹣sellingCDwithJamesPickeringonthepiano.ThemenuisItalianwithexcellentmeatandfreshfishpizzasandpasta面食.Bookearlytogetatable.Ourbarisopenalldayandservescocktailscoffeebeerandwhitewine. 21.Whocanhelpyouifyouwanttohaveyourmusicproduced? A.JulesSkye.B.GeeWhizz. C.CharlotteStone.D.JamesPickering. 22.Atwhichplacecanpeopleofdifferentagesenjoyagoodlaugh? A.TheCyclopsTheatreB.Kaleidoscope C.VictoriaStageD.PizzaWorld 23.WhatdoweknowaboutSimon'sWorkshop? A.Itrequiresmembershipstatus. B.Itlaststhreehourseachtime. C.Itisrunbyacomedyclub. D.ItisheldeveryWednesday. 24.WhenwillCharlotteStoneperformhersongs? A.5.00pm﹣7.30pm. B.7.30pm﹣1.00am. C.8.00pm﹣11.00pm. D.8.30pm﹣10.30pm.
NA代表阿伏加德罗常数的数值下列说法正确的是
我国科学家在天然气脱硫研究方面取得了新进展利用如图装置可发生反应H2S+O2─H2O2+S↓． 已知甲池中发生的反应为下列说法正确的是
若fx和gx都是奇函数且Fx＝afx+bgx+2在0+∞上有最大值5则Fx在﹣∞0上
已知四棱锥P﹣ABCD底面ABCD是∠A＝60°的菱形又PD⊥底面ABCD点MN分别是棱ADPC的中点． Ⅰ证明DN∥平面PMB Ⅱ证明平面PMB⊥平面PAD．
JoyintheJourney Ifyouhaveeverbeendiscouragedbecauseoffailurepleasereadon.Foroftenachievingwhatyousetouttodoisnottheimportantthing.Letmeexplain. Twobrothersdecidedtodigadeepholebehindtheirhouse.Astheywereworkingacoupleofolderboysstoppedbyto1.Whatareyoudoing?askedoneofthevisitors.Weplantodigaholeallthewaythroughthe2!Oneofthebrothersvolunteered3. Theolderboysbeganto4tellingtheyoungeronesthatdiggingaholeallthewaythroughtheearthwas5.Afteralongsilenceoneofthe6pickedupajarfullofspiderswormsandmanyotherkindsofinsects.He7thelidandshowedthewonderful8tothescoffing嘲笑的visitors.Thenhesaidquietlyand9Evenifwedon'tdigallthewaythroughtheearthlookatwhatwehavefound10theway! Theirgoalwasfartooambitiousbutitdidcausethemtodig.Andthatis11agoalisfor﹣tocauseustomoveinthe12wehavechoseninotherwordstokeepus53!Butnoteverygoalwillbefully14.Noteveryjobwillend15.Noteveryhopewillcometopass.Noteverylovewilllast.Noteverydreamwillbe16.Butwhenyoufall17ofyouraimperhapsyoucansayYesbutlookatwhatIfoundalongtheway!Lookatthewonderfulthings18mylifebecauseItriedtodosomething!Itisinthedigging19lifeislived.AndIbelieveitisthejoyinthejourneyintheendthattruly20. 1.A.rest B.work C.watch D.laugh 2.A.house B.earth C.wall D.road 3.A.calmly B.patiently C.excitedly D.impatiently 4.A.laugh B.think C.stare D.smile 5.A.important B.difficult C.impossible D.interesting 6.A.passers﹣by B.watchers C.visitors D.diggers 7.A.pulled B.removed C.broke D.pushed 8.A.contents B.scenes C.pictures D.jars 9.A.properly B.confidently C.carefully D.happily 10.A.in B.along C.to D.out 11.A.what B.how C.where D.which 12.A.way B.direction C.life D.sight 13.A.thinking B.moving C.digging D.living 14.A.made B.prepared C.kicked D.achieved 15.A.hopelessly B.pleasantly C.surprisingly D.successfully 16.A.cometrue B.realized C.made D.treasured 17.A.short B.lost C.out D.behind 18.A.breakinginto B.turningto C.cominginto D.holdingto 19.A.when B.where C.which D.that 20.A.matters B.happens C.appears D.exists
Iwanttostartwiththeresponsibilityyouhavetoyourself.Everysingleoneofyouhassomethingthatyou'regoodat.Everysingleoneofyouhassomethingtooffer.Andyouhavearesponsibilitytoyourselftodiscoverwhatthatis.That'stheopportunityaneducationcanprovide. Maybeyoucouldbeagreatwriter﹣maybeevengoodenoughtowriteabookorarticlesinanewspaper﹣butyoumightnotknowituntilyouwritethatEnglishpaper﹣thatEnglishclasspaperthat'sassignedtoyou.Maybeyoucouldbeaninnovatororaninventor﹣maybeevengoodenoughtocomeupwiththenextiPhoneorthenewmedicineorvaccine﹣butyoumightnotknowituntilyoudoyourprojectforyourscienceclass.MaybeyoucouldbeamayororasenatororaSupremeCourtjustice﹣butyoumightnotknowthatuntilyoujoinstudentgovernmentorthedebateteam. AndnomatterwhatyouwanttodowithyourlifeIguaranteethatyou'llneedaneducationtodoit.Youwanttobeadoctororateacherorapoliceofficer?Youwanttobeanurseoranarchitectalawyeroramemberofourmilitary?You'regoingtoneedagoodeducationforeverysingleoneofthosecareers.Youcan'tdropoutofschoolandjustdropintoagoodjob.You'vegottotrainforitandworkforitandlearnforit. Andthisisn'tjustimportantforyourownlifeandyourownfuture.Whatyoumakeofyoureducationwilldecidenothinglessthanthefutureofthiscountry.ThefutureofAmericadependsonyou.Whatyou'relearninginschooltodaywilldeterminewhetherweasanationcanmeetourgreatestchallengesinthefuture. 1.Whatistheresponsibilityyouhavetoyourself? A.Todiscoverwhatthatis. B.TostudyforthefutureofAmerica. C.Tobeagreatwriter. D.Tobeateacher. 2.What'stheopportunityaneducationcanprovideaccordingtothepassage? A.Tobeapresident. B.Tobeamillionaire. C.Tobeamayororasenator. D.Tomeetgreatestchallenges. 3.Whatwillyouneedtodoforapoliceofficer? A.Tofindagoodjob. B.Toneedagoodeducation. C.Todropoutofschool. D.Tobetrained. 4.Themainideaofthispassageis. A.educationthatAmericacanprovide B.whatyouwanttodowithyourlife C.theimportanceofeducation D.responsibility
设抛物线y2＝8x的焦点为F准线为lP为抛物线上一点PA⊥lA为垂足．如果直线AF的斜率为那么|PF|＝
一个圆锥被过顶点的平面截去了较小的一部分余下的几何体的三视图如图则该几何体的体积为．
假定你是李华你校摄影俱乐部photographyclub将举办国际中学摄影展.请给你的英国朋友Peter写封信.请他提供作品.信的内容包括: 1.主题:环境保护; 2.展览时间; 3.投稿邮箱:intlphotoshow@gmschool.com. 注意: 1.词数100左右; 2.可以适当增加细节以使行文连贯.
假定你校正在开展根除陋习创建文明校园活动.请你以此为主题用英语写一篇发言稿向全校学生倡议: 1.根除:乱扔垃圾浪费食物吸烟…2.提倡:讲礼貌互助… Dearfriends Asisknowntoallourschoolhaslaunchedacampaignagainstbadhabitsinordertobuildacivilizedcampus. That'sall.Thankyou.
Teacherssaythedigitalagehashadagoodinfluence﹣andanot﹣so﹣goodinfluence﹣onthisgenerationofAmericanteenagers.Morethan2000teacherstookanonlinesurvey.Three﹣quartersoftheteacherssaidtheInternetanddigitalsearchtoolshavehadamostlypositiveeffectontheirstudents'researchhabitsandskills.But64percentsaidthetechnologiesdomoretodistract使……分心studentsthantohelpthemacademically.And87percentagreedthatthesetechnologiesarecreatinganeasilydistractedgenerationwithshortattentionspans. ThePewInternetProjectdidthesurveywiththeNationalWritingProject.JudyBuchananisthevicedirectoroftheNationalWritingProjectandaco﹣authorofthereport.Ms.Buchanansaysdigitalresearchtoolsarehelpingstudentslearnmoreandfaster.Teachersreallyfavorthesetoolsbecausetheyarewaystomakesomeofthelearningexcitingandengaging.Youngpeoplefavorthesetools.Thegoalistoreallyhelpthembecomecreatorsofmeaningfulcontentandnotjustsortofconsumers. Butoneproblemthesurveyfoundisthatmanystudentslackdigitalliteracy.TheytrusttoomuchoftheinformationtheyfindontheInternet.Judysaysthesestudentshaven'tdevelopedtheskillstodeterminethequalityofonlineinformation.It'ssomethingthatreallyhastobetaughtandpaidattentionto.Becauseinaworldinwhichthingshappenquicklyyoudoneedtostepbackreflectandanalyzetheinformationyouhave. Anotherproblemisblamedonsomethingthatmightnotseemlikeaproblematall:beingabletoquicklyfindinformationonline.Teacherssaytheresultisareductioninthedesireandabilityoftheirstudentstoworkhardtofindanswers.Theysaystudentsareoverlydependentonsearchenginesanddonotmakeenoughuseofprintedbooksorresearchlibraries. ManyteachersarealsoconcernedthattheInternetmakesiteasyforstudentstocopyworkdonebyothersinsteadofusingtheirownabilities. 1.Thetextmainlytellsus. A.allthestudentsusedigitaltools B.theInternetisplayingakeyrole C.teachersencourageusingdigitaltools D.digitaltoolsbringaboutbenefitsandproblems 2.Whichofthefollowingbestshowsthestructureofthetext? ①＝Para1②＝Para2③＝Para3④＝Para4⑤＝Para5 3.Theunderlinedsentenceinthethirdparagraphprobablymeans. A.studentsdonothavetherightdigitaltools B.studentsdonotalwayshaveaccesstotheInternet C.studentshaven'ttheabilitytoadjustthemselves D.studentscan'tjudgeonlineinformationproperly 4.Somestudentsdon'ttendtoworkhardbecause. A.theycangetanswersontheInternetquickly B.printedbooksandlibrariesaroundaren'tenough C.theInternetcan'tmakestudentsconcentrate D.theycancopyeachothers'workwithoutbeingpunished
已知全集U＝RA＝{x|x＜1}B＝{x|x≥2}则集合∁UA∪B等于
Hundredsofpeoplehaveformedimpressionsofyouthroughthatlittledevice装置onyourdesk.Andthey'veneveractually41you.Everythingtheyknowaboutyou42throughthisdevicesometimesfromhundredsofmilesaway.43heyfeeltheycanknowyou44fromthesoundofyourvoice.That'showpowerfulthe45is. Powerfulyesbutnotalways46.ForyearsIdealtwithmytravelagentonlybyphone.RanimyfacelessagentwhomI'dnevermet47gotmerock﹣bottompricesonairfarescarsandhotels.Buthercoldvoicereally48me.Isometimeswishedto49anotheragent. OnemorningIhadto50animmediateflighthomeforafamilyemergency.IranintoRani'soffice51.Thewomansittingatthedesk52mymadnesssympatheticallyjumpedup.Shegavemea53smilenoddedwhilelisteningpatientlyandthenprintedoutthe54immediately.Whatawonderfullady!Ithought. Rushingout55IcalledoutovermyshoulderBythewaywhat'syourname?I'mRanishesaid.Iturnedaroundandsawa56womanwithabigsmileonherfacewavingtowishmeasafetrip.Iwas57!WhyhadIthoughtshewascold?Raniwaswellso58. SittingbackinthecaronthewaytotheairportIfigureditallout.Rani's59﹣﹣﹣herwarmsmilehernodsher‘I'mhereforyou'60﹣﹣﹣wereallsilentsignalsthatdidn'ttravelthroughwires. 41.A.accepted B.noticed C.heard D.met 42.A.came B.moved C.ran D.developed 43.A.Thus B.Yet C.Then D.Indeed 44.A.rather B.also C.just D.already 45.A.Telephone B.voice C.connection D.impression 46.A.direct B.useful C.easy D.accurate 47.A.inperson B.bymyself C.inpublic D.onpurpose 48.A.annoyed B.interested C.discouraged D.confused 49.A.promote B.train C.find D.know 50.A.arrange B.postpone C.confirm D.book 51.A.forthefirsttime B.atanytime C.fromtimetotime D.ingoodtime 52.A.expecting B.seeing C.testing D.avoiding 53.A.shy B.comforting C.familiar D.forced 54.A.bill B.form C.ticket D.list 55.A.hopefully B.disappointedly C.gratefully D.regretfully 56.A.careful B.serious C.nervous D.pleasant 57.A.amused B.worried C.helpless D.speechless 58.A.calm B.nice C.proud D.clever 59.A.forgiveness B.eagerness C.friendliness D.skillfulness 60.A.explanation B.attitude C.concept D.Behavior
已知ABCD是原子序数依次增大的四种短周期主族元素A的周期数等于其主族序数B原子的价电子排布为nsnnpnD是地壳中含量最多的元素．E是第四周期的p区元素且最外层只有2对成对电子F元素的基态原子第四能层只有一个电子其它能层均已充满电子． 1基态E原子的价电子排布图． 2BCD三元素第一电离能由大到小的顺序为用元素符号表示 3BD32﹣中心原子杂化轨道的类型为杂化CA4+的空间构型为用文字描述． 41molBC﹣中含有π键的数目为NA． 5DE元素最简单氢化物的稳定性＞填化学式理由是． 6CF两元素形成的某化合物的晶胞结构如右图所示则该化合物的化学式是C原子的配位数是．若相邻C原子和F原子间的距离为acm阿伏伽德罗常数为NA则该晶体的密度为g/cm3用含aNA的符号表示．
Readingcanbeasocialactivity.Thinkofthepeoplewhobelongtobookgroups.Theychoosebookstoreadandthenmeettodiscussthem.NowthewebsiteBookCrossing.comBookCrossing.comturnsthepageonthetraditionalideaofabookgroup. Membersgoonthesiteandregisterthebookstheyownandwouldliketoshare.BookCrossingprovidesanidentificationnumbertostickinsidethebook.Thenthepersonleavesitinapublicplacehopingthatthebookwillhaveanadventuretravelingfarandwidewitheachnewreaderwhofindsit. BrucePedersonthemanagingdirectorofBookCrossingsaysThetwothingsthatchangeyourlifearethepeopleyoumeetandbooksyouread.BookCrossingcombinesboth. Membersleavebooksonparkbenchesandbusesintrainstationsandcoffeeshops.Whoeverfindstheirbookwillgotothesiteandrecordwheretheyfoundit. Peoplewhofindabookcanalsoleaveajournalentrydescribingwhattheythoughtofit.E﹣mailsarethensenttotheBookCrossingtokeepthemupdatedaboutwheretheirbookshavebeenfound.Brucepetersonsaystheideaisforpeoplenottobeselfishbykeepingabooktogatherdustonashelfathome. BookCrossingispartofatrendamongpeoplewhowanttogetbacktotherealandnotthevirtual虚拟.Thesitenowhasmorethanonemillionmembersinmorethanonehundredthirty﹣fivecountries. 29.Whydoestheauthormentionbookgroupsinthefirstparagraph? A.Toexplainwhattheyare. B.TointroduceBookCrossing. C.Tostresstheimportanceofreading. D.Toencouragereaderstosharetheirideas. 30.WhatdoestheunderlinedworditinParagraph2referto? A.Thebook. B.Anadventure. C.Apublicplace. D.Theidentificationnumber. 31.WhatwillaBookCrosserdowithabookafterreadingit? A.Meetotherreaderstodiscussit. B.Keepitsafeinhisbookcase. C.Passitontoanotherreader. D.Mailitbacktoitsowner. 32.Whatisthebesttitleforthetext? A.OnlineReading:AVirtualTour B.ElectronicBooks:AnewTrend C.ABookGroupBringsTraditionBack D.AWebsiteLinksPeoplethroughBooks.
计算下列各式的值 1 2log3．
从古至今铁及其化合物在人类生产生活中的作用发生了巨大变化． 1古代中国四大发明之一的司南是由天然磁石制成的其主要成分是填字母 序号． a．Feb．FeOc．Fe3O4d．Fe2O3 2现代利用铁的氧化物循环裂解水制氢气的过程如下图所示．整个过程与温度密切相关当温度低于570℃时Fe3O4s和COg反应得到的产物是Fes和CO2g阻碍循环反应的进行． ①已知Fe3O4s+COg⇌3FeOs+CO2g△H1═+19.3kJ•mol﹣1 3FeOs+H2Og⇌Fe3O4s+H2g△H2═﹣57.2kJ•mol﹣1 Cs+CO2g⇌2COg△H3═+172.4kJ•mol﹣1 铁氧化物循环裂解水制氢气总反应的热化学方程式是． ②下图表示其他条件一定时Fe3O4s和COg反应达平衡时COg的体积百分含量随温度的变化关系． i．反应Fe3O4s+4COg⇌3Fes+4CO2g△H0填“＞”“＜”或“＝”理 由是． ii．随温度升高反应Fe3O4s+COg⇌3FeOs+CO2g平衡常数的变化趋势是1040℃时该反应的化学平衡常数的数值是． 3①古老而神奇的蓝色染料普鲁士蓝的合成方法如下 复分解反应ii的离子方程式是． ②如今基于普鲁士蓝合成原理可检测食品中CN﹣方案如下 若试纸变蓝则证明食品中含有CN﹣请解释检测时试纸中FeSO4的作用．
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