一个圆锥的底面半径是4cm，高是3cm．它的体积是　 　cm3．

﹣﹣AsweknowitsverydifficulttoliveinaforeigncountryliketheUKtheUSandsoon. ﹣﹣Iagree.ifyoudon'tunderstandthelocallanguage. A.Especially B.Generally C.Naturally D.Exactly

下面是奇奇记录的本班同学喜欢的玩具情况． 1把统计结果填入下表中． 2喜欢的人数最多喜欢的人数最少． 3喜欢玩具汽车的同学比喜欢玩具熊的多人． 4假如这个班有一位同学因病没来这位同学最有可能喜欢哪种玩具为什么

StanfordisaworldfamousuniversityonthewestcoastoftheUS.1becausethepoorboydiedofastrangedisease. TouristsareoftensurprisedatthebeautyofStanford.Amongthegreentreesbuildingswithyellowwallsandredtopsmakeupabeautifulpicture.2.That'sbecausetheywerethefavoritesofMrs.Stanford. 3.Itstandsatthecenter.ItwasbuiltbyMrs.Stanfordtorememberherhusbandwhodevotedhimselftotheuniversity.TherestudentsandteacherscancommunicatewithGodandtheycanalso holdgreatactivitiessuchasconcertsandcelebrations. 4.Itisthelandmarkoftheuniversity.AmannamedHooverhaddonealotfortheuniversity.Thethingsheonceusedcanbeseenonthefirstfloor.Onthetopofthetowertouristscanhaveagoodlookatthewholecampus. AsoneoftheworldtopuniversitiesStanfordhasmanysubjectsthatstandamongthetoponesintheworld.5.Ifyouwanttostudycomputerinauniversityabroadmaybeitisyourbestchoice. A.Andcomputersciencehasbeenthefirstformanyyears B.ThetallestbuildinginStanfordisHooverTower C.Manytouristswonderwhyyellowandredwerechosen D.TheBigChurchisthemostimportantbuildinginStanford E.ItwasbuiltbyStanfordandhiswifeinmemoryoftheironlyson

一种商品八折出售售价是原价的售价是原价的%

LastyearIwas14yearsold.Ihadanenemyagirlwholikedtopointoutmyshortcomings缺点.Daybydayherlistgrew:Iwasverythin;Iwas1;Isometimesdidn'trespecttheteachersItalkedtoomuch:Iwastooproudandsoon.AtlastIcouldn'tstandit.Icriedand2tomyfather.Helistenedtomequietly.ThenheaskedAlfredarethethingsshesaystrueornot?Didn'tyoueverwonderwhatyouarereally3?Wellyounowhavethatgirl'sopinion.Goandmakealistofeverythingshe4andfindoutthepointsthataretrue.Paynoattentiontotheotherthingsyouheard. Idid5myfathertold.TomysurpriseIdiscoveredthatabouthalfthethingsweretrue.SomeofthemIcouldn'tchangelikebeingverythinbutalargenumberIcouldandsuddenlyIwantedtochange.ForthefirsttimeIgotafairlyclearpictureof6. IbroughtthelistbacktoDaddy.Herefusedtotakeit.It'sjustthecaseforyou.hesaidyouknowbetterthananyonethe7.aboutyourselfButyouhavetolearntolistennotjustcloseyourearsinangerandfeelinghurt.Whensomethingsaidaboutyouistrueyou'llfinditwillbeofgreathelptoyou.Ourworldisfullofpeoplewhothinktheyknowyourduty.Don'tshutyourearslistentothemallbuthearthefactonlyanddowhatyouknowisrightthing8. Inmylife.I'venever9abetterpieceofadvice.Thanksfortheshortcomingsthatsomeonehaspointedoutforus.Theycanmakeusknowourselvesmoreandimproveus10aswegrowup.

某店原来将一批羽绒服按100%的利润定价出售淡季时商家按38%的利润重新定价这样售出了其中的40%．旺季价格有所回升售出了余下的全部羽绒服．结果实际获得的总利润是原定利润的45.2%那么旺季的价格是原定价格的%．[注按100%的利润定价指的是定价一成本×1+100%]

每个小方格为1平方厘米 1梯形的面积是平方厘米． 2画一个与梯形面积相等的平形四边形． 3画出把上题中画好的平行四边形按21的比放大后的图形． 4平行四边形放大后的面积与原来的面积的比是

一个圆锥形的稻谷堆底面半径是2米高是3米．如果把这些稻谷装入一个圆柱形的粮库里已知粮库的底面积是6.28平方米求粮库的高是多少米

学校买来380本图书按一定的比分配给三个班它们的比可能是

把一个圆柱削成一个最大的圆锥削去部分的体积是圆锥体积的2倍．．判断对错

把与平行四边形面积相等的三角形涂上颜色．

一项工程乙单独做20天完成．如果第一天甲做第二天乙做这样交替做也恰好用整数天完成如果第一天乙做第二天甲做这样交替做结果比上次交替做要多半天才能完成．这项工程由甲单独做需要几天可以完成

要使●是〇的2倍再画个●．

静止在水平面上的小车固定在刚性水平轻杆的一端杆的另一端通过小圆环套在竖直光滑的立柱上．每当小车停止运动时车上的弹簧枪就会沿垂直于轻杆的水平方向自动发射一粒弹丸然后自动压缩弹簧并装好一粒弹丸等待下次发射直至射出所有弹丸．下图为该装置的俯视图．已知未装弹丸的小车质量为M每粒弹丸的质量为m每次发射弹丸释放的弹性势能为E发射过程时间极短小车运动时受到一个与运动方向相反大小为小车对地面压力λ倍的作用力忽略所有摩擦阻力重力加速度为g． 1若小车上只装一粒弹丸求弹丸被射出时小车的速度大小 2若l问中发射弹丸后小车恰能运动一周求射出弹丸时杆对小车的拉力大小

在算盘上每一个上珠表示每一个下珠表示以空档表示0以档表示数位．

阅读下面的文章从每题所给的ABCD四个选项中选出最佳选项 Atabout6p.m.onSaturdayaforestfirebrokeoutinavillageinMuLiLiangshan.Thelocalgovemmentactedquicklyand689peopleweresenttoputoutthefire.FiregroupswerefightingthefireonSundaywhenasuddenchangeofwinddirectioncausedahugefireball.27firefightersand3localslosttheirlives.Mostofthefirefighterswereintheirtwentiesandtwoofthemwerelessthantwentythoughseveralwereolder.TheirdeathtouchedourheartsalloverChina.Thereisreasonenoughtoregardthemasheroes.PresidentXiJinpingPremierLiKeqiangandmanyotherleaderscaredfortheheroesandexpressedcondolencetotheheroes'familiesandfriends. Weshouldrememberalltheheroesandtheirspiritbraveryshowedinfightingthefire.Astheoldsayinggoes:anationislostwithoutitsmemories.ForestfiresarecommoninspringrulestopreventfireshavecomeoutinLiangshan.Manyexpertsbelievetherearesomereasonsforforestfires.Thefirstreasonisweatherchange.Warmeranddrierweatherleadstodangerousfireconditions.Nextlighteningisanotherreason.Drygrassandtreeseasilycatchfire.Finallyhotwindsaddtothepossibilityofforestfires.Thewindspreadsafirequickly.However90%offorestfiresarecausedbyhumansaccordingtoareport.Forestfirescanburnatover900℃andreachheightsofmorethan50meters.Forestfirescanmoveatspeedsofupto23kilometersanhourburningeverything﹣treesbrushhomesevenpeopleExpertsremindpeopletobecarefulduringtheholidayofQingmingknownasTombSweepingDay.Millionsofpeopletraveltotheirhomesduringtheholidaysotherisksoffiresinmountainsarehigh. Inordertokeeptheheart﹣brokenlessoninmindweshouldstopfiresfromhappeningagain. 1AccordingtothepassagewhichofthefollowingisNOTtrue? A.Allthefirefighterswholosttheirliveswereintheirtwenties. B.About700peopleweresenttoputoutthefire. C.Asuddenchangeofwinddirectionledtoahugefireball. D.ThedeathoftheheroestouchedourheartsaroundChina. 2Allofthefollowingcancauseforestfiresexceptinthepassage. A.weatherchange B.lighteningandhotwinds C.humanbehavior D.tombSweepingDay 3Whatdoestheunderlinedsentencemeaninthispassage? A.Weshouldrememberthereasonsforforestfiresincludingtheconditionsfromnatureandhumans. B.Weshouldremembertheheroesandtheirspiritbraveryshowedinfightingthefire. C.Weshouldrememberthenumberoftheheroesthatlosttheirlivesinfightingthefire. D.WeshouldremembertobecarefulduringtheholidayofQingmingknownasTombSweepingDay. 4Whatisthecharacterofforestfiresfromthepassage? A.Forestfirescanburnatmorethan9000Candreachheightsofover50meters. B.Forestfirescanrunatspeedsofupto23kilometersanhour. C.Forestfirescanburneverything﹣treesbrushhomesevenpeople. D.BothABandC. 5Youcanprobablyfindthispassage. A.inanewsreport B.inafairybook C.inastory﹣book D.inanovel

按下面步骤计算再把最后得到的数与开头的数比较你能发现什么想想为什么

如图所示带电小球a由绝缘细线PM和PN悬挂而处于静止状态其中PM水平地面上固定一绝缘且内壁光滑的圆弧细管道GH圆心P与a球位置重合管道底端H与水平地面相切一质量为m可视为质点的带电小球b从G端口由静止释放当小球b运动到H端时对管道壁恰好无压力重力加速度为g．在小球b由G滑到H过程中下列说法中正确的是

某校男女生比例如图中的扇形区男生占全校人数的百分数为

新建一座工厂计划投资200万元实际只投资175万元．实际投资是计划投资的百分之几

﹣﹣Lindacouldyouremember? ﹣﹣HaveyouforgottenweagreedtogotoHongkong? A.wherearewegoingafterexam  B.wherewearegoingaftertheexam  C.wherearewegoingtoaftertheexam  D.wherewearegoingtoaftertheexam

比70m少是m比kg多40%是112kg．

如图所示由红光和蓝光组成的一细束复色光投射到一块玻璃碎片上被分成①②两束则下列说法正确的是

把一个圆形纸片对折若干次折痕的交点是这些折痕是．

Inyourlifetherewillbetimeswhenyouhavetodecidewhattodo.istheroadsignforthat.Rightorleft?Maybeit'sjustaquestionofhowtomanageyourtime﹣youshouldthinkhowyoucoulddivideyourtimebetweenstudyingandhobbies. A. B. C. D.

晒谷场上有9堆同样大小的圆锥形小麦每堆底面周长6.28米高0.6米把它运进仓库用一张长6.78米宽2米的长方形芦苇围成一个直圆柱粮囤接头处重叠0.5米这些小麦能否都可以装进这粮囤

如图所示光滑水平面OB与足够长粗糙斜面BC交于B点．轻弹簧左端固定于竖直墙面用质量为m1的滑块压缩弹簧至D点然后由静止释放滑块滑块脱离弹簧后经B点滑上斜面上升到最大高度并静止在斜面上．换用相同材料质量为m2的滑块m2＞m1压缩弹簧至同一点D后重复上述过程．不计滑块经过B点时的机械能损失下列说法正确的是

正方体的棱长扩大到原来的3倍体积扩大到原来的

一个圆柱削去2.4立方米后正好削成一个与它等底等高的圆锥削成的这个圆锥的体积是立方米圆柱原来的体积是立方米．

Youmayoftenhearsomemyths传言aboutanimals.Forexampleonedogyearequalsaboutsevenhumanyearschameleons变色龙changecolortomatchtheirenvironmentTodaylet'stalkaboutbirds.Itissaidthatifyoutouchababybirdtheparentswillcompletelyabandon抛弃it.Doyoureallybelieveit? Infactmostbirdshaveaverypoorsenseofsmellsoinmostcasesareunabletoevennoticethesmellofhumansonbabybirds.Notonlythatbutmosttypesofbirdsaren'tsoquicktoabandontheiryoungwhentheysensedanger.Sometypeswillevendotheirbesttoprotecttheiryoungwhentheyareindanger. Indeedinveryfewknowncasesparentbirdssometimesabandonedtheirnestsfromsomethingtouchingtheiryoungjustbecausetheynoticeditbysightnotsmell.Whenthishappenstheparentbirdsusuallywon'tcareotherthantobealittlemorecarefulthannormal.Sometimestheymaytemporarily暂时地abandonthenestinordertobetterwatchwhateverdisturbedtheirnestcomesback. What'smoreinmostcasesevenifthenestisdestroyedbywindorsomethingtothateffectyoucouldcreateanewoneandputallthebabybirdsbackinitandwhentheparentscamebacktheywouldn'tcaretheirbabybirdswereinadifferentnestsolongasyouputthenewnestnearwheretheoldonewassotheycanfindit. 1Whichofthefollowingistrue? A.Birdshaveaverygoodsenseofsmell. B.Ababybirdwilldiesoonifitistouchedbysomeone. C.Whateverdisturbedthenestwillnevercomeback. D.Somebirdswillprotecttheirbabieswhentheyareindanger. 2WhatdoestheunderlinedworditinParagraph3referto? A.Theirnest. B.Theirbaby. C.Somebirdsabandoningtheirnests. D.Somethingtouchingtheiryoung. 3Theparentbirdsifwemakeanewnestforbabybirdstotaketheplaceoftheoldone. A.willnevercomeback B.willworryabouttheirbabies C.won'tmind D.willtaketheirbabiesaway 4Whichofthefollowingshowsthestructure结构ofthepassage? ①＝Paragraph1第一段②＝Paragraph2 5Whatisthebesttitleofthispassage? A.BirdTruth B.BabyBirds C.BirdNests D.BirdSmell

氢原子的能级图如图所示现让光子能量为E的一束光照射到大量处于基态的氢原子上氢原子能发出3种不同频率的光那么入射光光子的能量E为eV．若某种金属的逸出功为3.00eV则用上述原子发出的三种光照射该金属产生的光电子的最大初动能的最大值为eV．

﹣didtherainstormcome? ﹣Whileweaphysicslessonyesterday. A.When;havehad B.While;arehaving  C.When;werehaving D.While;have

一件上衣300元上衣比裤子少一条裤子多少钱

Manyenvironmentalgroupsarewarningthatoceansoftheworldareingreatdanger.Inthepast50yearsthenumberofwaterwithzerooxygen氧气intheopenoceanhasincreasedmorethanfourtimes.Inthenearcoastwaterbodiesincludingtherivermouthandseaslow﹣oxygenareashaveincreasedmorethan10timessince1950.ScientistsdiscoverthatoxygencontinuesdroppingeveroutsidethesezonesastheEarthwarms.Tostopthedroptheworldneedstocontrolinbothclimatechangeandnutrient养分pollution. Oxygenisamusttolifeintheoceans.ThedropinoceanoxygenisamongthemostseriouseffectsofhumanactivitiesontheEarth'senvironment. Thisisthefirsttimeforthescientiststotakesuchadeeplookatthecausesresultsandsolutionstolowoxygenworldwideinboththeopenoceanandthenearcoastwaters.AbouthalfoftheoxygenonEarthcomesfromtheocean.Howevermixedeffectsofnutrientloadingandclimatechangearegreatlyincreasingthenumberandsizeofdeadzonesintheopenoceanandthenearcoastwaterswhereoxygenistoolowtosupportmostsealife. Intheareastraditionallycalleddeadzones.likethoseinChesapeakeBayandtheGulfofMexicooxygendropstolevelssolowthatmanyanimalshavetroubleinbreathinganddie.Asfishesrunawayfromthesezonestheirlivingareasbecomesmallerandsmaller.Buttheproblemgoesfarbeyonddeadzones.Evensmalleroxygendropscanholdupthegrowthinanimalsandleadtodiseaseorevendeath.Lowoxygenalsocancausethereleaseofdangerouschemicals.Althoughafewanimalscangrowwellindeadzonesoverallbiodiversity多样性falls. 1Howtostopthedropofoceanoxygeninthearticle? A.Bycontrollinginbothclimatechangeandnutrientpollutionaroundtheworld. B.Bytakingadeeplookatthecausesresultsandsolutionstolowoxygenworldwide. C.Byrunningawayfromthesezonesforthelivingareasbecomesmallerandsmaller. D.Bycuttingdownthenumberofanimalsintheoceans. 2Whyarethesewaterscalleddeadzonesfromthearticle? A.Becausetheoxygenintheseareasistoolowformostsealifetolive. B.Becausenutrientloadingandclimatechangearegreatlyincreasing. C.Becausetherearenoanimalslivingintheseareas. D.Becauselowoxygenalsocancausethereleaseofdangerouschemicals. 3WhichofthefollowingstatementsisTRUEaccordingtothearticle? A.Onlyafewanimalslivingintheseaneedoxygen. B.Climatechangecanhelpcutdownthedeadzones. C.Fishesgrowfasterandbetterinlowoxygenareas. D.Humanactivitieshavemanyseriouseffectsonoceanenvironment.

﹣﹣Wherewillthe2022WinterOlympicsCindy? ﹣﹣InBeijingthecapitalofChinathefirstcitytohostbothSummerandWinterOlympics. A.betakenplace B.takeplace  C.takepart D.betakenpart

1把三角形先向右平移10格再向上平移4格． 2把最右边的图形补全使它成为轴对称图形．

高速公路的ETC电子收费系统如图所示ETC通道的长度是识别区起点到自动栏杆的水平距离．某人驾驶汽车以6m/s的速度匀速进入识别区ETC天线用了0.3s的时间识别车载电子标签识别完成后发出滴的一声司机发现自动栏杆没有抬起于是采取制动刹车汽车刚好紧贴栏杆停下．已知司机的反应时间为0.7s刹车的加速度大小为5m/s2则该ETC通道的长度约为

一个直角三角形的三条边分别是3厘米4厘米5厘米这个直角三角形面积是

为庆祝校庆同学们要做360面小旗已经做了一部分还剩下没做．已经做了面小旗．

有一个木制圆锥模型底面直径是4dm高是9dm． ①这个圆锥模型的体积是dm3． ②如果从圆锥的顶点到底面圆心把这个模型切成完全一样的两部分那么表面积增加了dm2．

物体甲做匀变速直线运动物体乙做匀速直线运动它们的位移﹣时间图象如图所示t＝2s时曲线与横轴相切．下列说法正确的是

工地上运来的沙堆成一个圆锥形底面积是12.56平方米高是1.2米每立方米沙约重1.7吨这堆沙一共有多少吨得数保留整数

小明按照如图的方法用灰色和白色正方形摆图形． 当中间摆n个灰色的正方形时四周共需要摆个白色正方形．

把一张长方形纸的纸片对折4次每份是这张纸的

物理学中用磁感应强度B表征磁场的强弱磁感应强度的单位用国际单位制SI中的基本单位可表示为

计算下面各题．能简算的要简算 124.21+13.98﹣13.21 229.7﹣9.65﹣5.35 311.8×0.6﹣1.8×0.6 48.23×10.1

乐乐有4本科技书和3本故事书他准备捐出科技书和故事书各一本他有种不同的捐法．

把一块三角形的地画在比例尺是1500的图纸上量得图上三角形的底是12厘米高8厘米这块地实际面积是

JackcomesfromAmericabutheknowsmany传统folkstoriesaboutChinesefestivals.

图形的各边按相同的比放大后或缩小后所得的图形与原图形比较

圆柱体积是与它等底等高圆锥体积的倍．

一根钢管截去了还剩下米截去的和剩下的相比

把米的铁丝平均分成3份每份长米第二份占全长的．

把5克盐溶解到20克水中盐占盐水的20%．．判断对错

直接写出得数． 8﹣0.55＝ 4.8×0.5＝ 1.2÷0.6＝ 8.5+4.7＝ 10÷0.25＝ 0.5÷0.05＝ 0.24÷0.4＝ 4.5÷0.09＝

甲仓原来存粮是乙仓的后来甲仓增加存粮88吨这时乙仓与甲仓存粮吨数的比是67乙仓有存粮多少吨

把一根长6分米的长方体材料平均锯成3段表面积增加3.6平方分米这根木料的体积是立方分米．

等腰三角形中一个顶角是80°每个底角是°．

运送29.5吨煤先用一辆载重4吨的汽车运3次剩下的用一辆载重为2.5吨的货车运．还要运几次才能完设次数为x列出方程．

下面是育英小学和西门小学四五六年级学生回收电池统计图．根据统计情况估计一下哪个学校的学生回收的电池更多

AmajorfiredestroyedNotre﹣Dame巴黎圣母院builtinthe12and13centuriesinPanisonApril52019.改为被动语态 Notre﹣Damebuiltinthe12and13centuriesinParisbyamajorfireonApri152019.

等底等高的两个图形形状一定相同．判断对错

x和y成反比例关系的式子是

计算阴影部分的面积．

把4m长的绳子平均分成7段每段是这根绳子的每段长m．

习__说:我们都在努力奔跑我们都是追梦人. Weareveryhardwearealldreamchasers.PresidentXiJinpingsaid.

﹣SimonyoulooksmartintheT﹣shirt.Couldyoutellmeit? ﹣OK.Iboughtitinastoreonline. A.whereyoubought B.wheredoyoubuy  C.whenyoubuy D.whendidyoubuy

学校食堂运进一堆煤堆放成一个近似的圆锥．它的底面直径是6米高是1.3米．如果每立方米煤重1.8吨这堆煤重．

某工程计划造价80万元实际造价节省了2.4万元．实际造价节省了百分之几正确的解答是

▲▲●●●▲▲●●●▲▲●●● 照这样摆下去第36个是第48个是．

两个圆的周长相等那么它们的面积

一个圆锥形沙堆高1.5米底面周长是18.84米如果每立方米沙子重500千克那么这堆沙子共重多少千克

日本全国因海啸住进避难所的人数达256871人8在位上将避难所的人数四舍五入到万位约是人．

如图平行板电容器AB两极板水平放置将其和二极管串联接在电源上已知A板和电源正极相连二极管具有单向导电性．一带负电小球从AB间的某一固定点水平射入打在B板上的N点小球的重力不能忽略现通过上下平移A板来改变两板间距则下列说法正确的是

一个圆的半径1分米它的半圆周长是分米．

Canyouimaginethatwecouldbuildabeautifulcitywithrubbish?Maybeyouwillthinkitis1.Howeveritcanbetrue!Nothingisawasteifwehaveacreativemind.Letmeshowyousomethingabout2rubbish. Sometimeswecanseetonsofrubbishinthestreetsontheroadsnearthebuildingshereandthere.Manylargecitiesbecamesougly3it.Nobodylikesrubbishbutinfactsomerubbishcanbeusedagain.Allofuswanttosolvetheproblemwemustdosomethingto4rubbish.Weshouldtakeactionfromnowon.5somegoodthingswillnotbewasted. Doyouoftenthrowawaythingsyoudon'tneedanymore?Haveyoueverthoughtabouthowthesethingscanactuallybeputtogooduse?Forexamplewhenacargetstooolditmaynotrunanymore.Butwecanusethemetalofthecartomakesomethingelse.Whenabottleisemptyit6aswaste.Youdon'tknowbottleglasscanbemadeintosandandusedtobuildstreets.Rubbish7foodcanbechangedintofertilizertomakeplantsgrowbetter.Itischeapandsafe.Andotherrubbishcanalsobeusedtomakebuildingblocks.Now8machinesaredesignedforthat.9peoplewillwatchfilmsinabeautifulcinemawhichisbuiltoutofrubbish.Besidesbuildingsandroadscitiesmaybemadefromrubbish.Butsofarbuildingbeautifulcitiesmadefromrubbishisonly10. 1A.important B.understanding C.unbelievable D.possible 2A.returning B.reusing C.reflecting D.repeating 3A.because B.becauseof C.insteadof D.asfor 4A.makealivingas B.makepromisesto C.makeupourmindto D.makeuseof 5A.Ontheway B.Bytheway C.Inthisway D.Outoftheway 6A.willbethrownaway B.willthrowaway C.threwaway D.wasthrownaway 7A.from B.in C.on D.to 8A.fewerandfewer B.lessandless C.moreandmore D.moreandless 9A.Someday B.Theotherday C.Nowadays D.Intheday 10A.asymbol B.aletter C.alesson D.adream

﹣﹣MaLing'sChineseisn'tsoasWangMing's. ﹣﹣IknowthemverymuchButnowMaLingstudiesthanWangMingdoes. A.good;harder B.good;hard  C.better;harder D.better;better

在一个边长是5cm的正方形内画一个最大的圆．它的半径是

加工一批零件甲单独做需要10天完成乙单独做5天只完成这批零件的．如果让甲乙两人合作几天能完成这批零件的50%

一个直角三角形其中一个锐角是49°另一个锐角是度．

﹣﹣HelloLucypleasegivemesomeonhowtoimprovemyEnglish! ﹣﹣You'dbetterkeep___moreEnglishbooks. A.advices;read B.advice;read  C.advice;reading D.advices;reading

六年级1班有50人昨天有4人缺席昨天出席率是

用简便方法计算． 900﹣157﹣343＝

小冬爸爸5月份的工资总收入约是8000元按照如图进行支配那么用于教育费用约是

一个圆环形内圆的半径是4厘米外圆的半径是6厘米那么这个圆环的面积是．

某兴趣小组为测一遥控电动小车的额定功率进行了如下实验 ①用天平测出电动小车的质量为0.4kg ②将电动小车纸带和打点计时器按如图1所示安装 ③接通打点计时器其打点周期为0.02s ④使电动小车以额定功率加速运动达到最大速度一段时间后关闭小车电源．待小车静止时再关闭打点计时器设在整个过程中小车所受的阻力恒定． 在上述过程中打点计时器在纸带上所打的点迹如图2甲乙所示图中O点是打点计时器打的第一个点． 请你分析纸带数据回答下列问题 1该电动小车运动的最大速度为m/s 2该电动小车运动过程中所受的阻力大小为N 3该电动小车的额定功率为W．

下面是二1班同学最喜欢哪个季节的调查情况． 春季正正正正正夏季〇〇〇〇〇〇〇〇〇〇〇 秋季√√√√√√√√冬季 1请你根据上面记录的结果完成下表． 2二1班喜欢季的人数最多． 3喜欢季的人数比喜欢季的人数多人． 4如果组织二1班同学去游玩最好应安排在季因为．

只列式不计算 ① ②商店有一种衣服售价34元比原来定价便宜15%原来定价多少元

把1g盐放入99g水中盐与盐水的质量比是

Idon'twanttobeelse.Ijustwanttobe. A.anybody;myself B.somebody;myself  C.everybody;me D.anybody;me

OnApril23.2019aseriesofeventstocelebrate the1anniversaryoftheChinesePeople'sLiberationArmyPLANay中国人民海军washeldinQingdao. Destroyers驱逐舰sailedintheseasubmarines潜艇slidunderthesurfaceandfighterjetsflewacrossthesky.Itwasn'tascenefromawarmovieindeeditwasarealgrandnavalparade. Asalargecountry2morethan18000kilometersofcoastlineChinaneedsastrongnavy.Thiswasahardlesson3byhistory.AccordingtoXinhuafromthe1850suntil1949.foreignforcesusedtheseatomakeabout470invasionsofChina.ThereforethePLANavyhasbecomeakeylineofthenation'sdefense. AsPresidentXiJinpingsaidtheoceansareofgreatsignificanceastheysustainlifeandconnecttheworld.Theblueplanetthathumansinhabitisnotdividedintoislandsbytheoceans.4isconnectedbytheoceanstoformacommunitywithasharedfuturewherepeopleofallcountriessharewealandwoesaidXiduringhis5attheevent. 1A.seventy B.seventieth C.seventith D.seventeen 2A.has B.have C.with D.of 3A.teach B.taught C.learn D.learned 4A.But B.and C.or D.with 5A.speak B.talk C.chat D.speech

一物体静止在水平地面上在竖直向上拉力F作用下开始向上运动如图甲．在物体向上运动过程中其机械能E与位移x的关系图象如图乙已知曲线上A点的切线斜率最大不计空气阻力则

Thechildrenwere惩罚fortellinglies.

LeiFengSpiritCarryingon Itisnothardtodoonegooddeedbutitishardtodogooddeedsallyourlife.ChairmanMao1said.Andhecalledonpeopletolearnfromhim.Doyouknowwhothemanis?HeisLeiFeng. LeiFengwasborninapoorfamilyinalittlemountainvillageofHunanProvinceonDecember18th1940.Hedidn'tgotoschool2hewas10yearsold.Attheageof18hebecameasteel3.Hewasoftenpraisedforhisgoodjob.OnJanuary8th1960hejoinedthearmyandseveralmonthslaterhejoinedtheCommunistParty.HelovedthePartyandthepeopleandkeptdoingsomethinggoodforothers.Whenhegot4healwayssaidIt'smydutyandit'sjustthatsomepeopleneedsomehelpthereshouldbesomeonestandingout5themahand.Hebecameamodelsoldieroneyearlater.TooursadnessLeiFengdiedinanaccidentin1962. March5th6aLearnfromLeiFengDaysince1963.WhenLeiFeng'sDiarycameoutPeoplebegantoknowmoreabouthimthanbefore.NowthetermLivingLeiFenghasbecomeanameforanyonewhoisbraveanyonewhohas7loveforhiscountryanyonewhoworkshard8anyonewhoisalwaysreadytohelpothers. LeiFeng'sspiritwilllivein9hearts.LeiFeng'sspiritwillberememberedbythe10nationforever.Andwewillsurelypracticehisspiritinlifeashedid.

在数轴上从表示1的点出发向左移动3个单位长度的数是．

果园里有苹果树15行每行40棵还有桃树285棵桃树比苹果树少多少棵

下列说法正确的有

一个圆环形内圆的半径是4厘米外圆的半径是6厘米那么这个圆环的面积是．

箱子里有一些白球和黑球随意摸出一个球再放回去摇匀重复20次．依依和龙一鸣摸出的结果是 依依白球18次黑球2次 龙一鸣白球15次黑球5次． 箱子里可能球多球少．

下列有关热学知识的叙述中正确的是