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在如图所示的电路中,电源电压为4.5V保持不变,电压表量程0~3V,电流表量程0﹣0.6A,滑动变阻器R的规格是“10Ω 1A”,灯泡L标有“2.5V 0.5A”字样,若闭合开关S,两电表示数均不超...
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如图所示电源电压18V.且保持不变电流表接0~0.6A量程电压表接0~15V量程灯泡上标有6V3W字
如图所示的电路中电源电压6V保持不变电流表使用0﹣0.6A量程电压表使用0﹣3V量程定值电阻的规格为
电路允许通过的最大电流为0.3A
滑动变阻器连入电路的最小阻值为10Ω
电压表的最小示数为2V
电路的最大功率为3W
如图所示电路中电源电压U.=4.5V且保持不变灯泡L.标有2.5V.1.25W字样变阻器R.最大阻值
4Ω~10Ω
5Ω~20Ω
4Ω~20Ω
5Ω~10Ω
如图所示的电路电源电压保持不变.闭合开关S.调节滑动变阻器两电压表的示数随电路中电流变化的图线如图所
如图所示电路中电源电压U=4.5V且保持不变电阻R1=5Ω变阻器R2最大阻值为20Ω电流表量程为0~
2.5Ω~10Ω
2.5Ω~20Ω
5Ω~20Ω
0Ω~10Ω
如图所示的电路中电源电压为20V保持不变当开关S.闭合滑动变阻器的滑片滑至最左端时电流表示数为1.2
如图所示电路中电源电压U.=4.5V且保持不变定值电阻R1=5Ω变阻器R2最大阻值为20Ω电流表量程
0Ω~10Ω
0Ω~20Ω
5Ω~20Ω
2.5Ω~10Ω
如右图所示的电路电源电压保持不变闭合开关S.调节滑动变阻器两电压表的示数随电路中电流的变化的图像如图
如图所示电路中电源电压U.=4.5V且保持不变定值电阻R.1=5Ω变阻器R.2最大阻值为20Ω电流表
0Ω~10Ω
0Ω~20Ω
5Ω~20Ω
2.5Ω~10Ω
如图所示电路中电源电压U.=4.5V且保持不变定值电阻R.1=5Ω变阻器R.2的最大阻值为20Ω电流
0~10Ω
0~20Ω
2.5~20Ω
2.5~10Ω
如图所示电源电压U=4.5V且保持不变定值电阻R1=5Ω变阻器R2的最大阻值是20Ω电流表量程为0-
0Ω-10Ω
0Ω-20Ω
5Ω-20Ω
2.5Ω-10Ω
如图所示的电路中电阻R1=4ΩR2为滑动变阻器电源电压为12伏电源电压保持不变所用的电流表量程是0~
如图所示电路电源电压保持不变当开关S.由断开变为闭合时
电路中的总电阻变大,电压表V的示数增大
电流表A.
2
的示数不变,电压表V.的示数减小
电流表A.
1
的示数保持不变,电流表A.
2
的示数不变
电流表A.
1
的示数保持不变,电压表V.的示数增大
如图所示的电路中电源两端的电压保持不变闭合开关S.将滑动变阻器的滑片P.向右移下列说法中正确的是
电流表A.的示数变小
电压表V
l
的示数不变
电压表V
2
的示数变大
电压表V
l
与电压表V
2
的示数之和保持不变
一次实验中郝奇同学连接了如图所示的电路电源电压为6V且保持不变电阻R1=8Ω滑动变阻器R2的最大阻值
为了保证电路安全,实验中滑动变阻器接入电路的阻值范围是( ) A.0~2Ω
0~8Ω
2Ω~8Ω
8Ω~10Ω
如图所示的电路中电压表所用的量程不明当电路闭合后V1和V2的示数分别如图所示则电压表V1用的量程是_
如图所示电路中电源电压U=4.5V且保持不变定值电阻R1=5Ω滑动变阻器R2的规格为15Ω0.5A电
0Ω~10Ω
0Ω~20Ω
5Ω~20Ω
4Ω~10Ω
如图所示的电路中电源两端的电压保持不变闭合开关S.将滑动变阻器的滑片P.向右移下列说法中正确的是
电流表A.的示数变小
电压表V
l
的示数不变
电压表V
2
的示数变大
电压表V
l
与电压表V
2
的示数之和保持不变
如图所示的电路中电源两端的电压保持不变闭合开关S.将滑动变阻器的滑片P.向右移动下列说法正确的是
电压表V1与电压表V2的示数之和保持不变。
电压表V2与电流表A.的示数之比保持不变。
电流表A.的示数变小,电压表V1的示数变大。
电流表A.的示数变小,电压表V2的示数变大。
如图所示的电路中电压表所用的量程不明当电路闭合后V1和V2的示数分别如图所示电压表V1的量程是电压表
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Ifyoucouldhaveonesuperpowerwhatwoulditbe? Dreamingaboutwhetheryouwouldwanttoreadmindsseethroughwallsorhavesuperhumanstrengthmaysoundsillybutitactuallygetstotheheartofwhatreallymattersinyourlife. Everydayinourworkweareinspiredbythepeoplewemeetdoingextraordinarythingstoimprovetheworld. Theyhaveadifferentkindofsuperpowerthatallofuspossessthepowertomakeadifferenceinthelivesofothers. We'renotsayingthateveryoneneedstocontributetheirlivestothepoor.Yourlivesarebusyenoughdoinghomeworkplayingsportsmakingfriendsseekingafteryourdreams.Butwedothinkthatyoucanliveamorepowerfullifewhenyoudevotesomeofyourtimeandenergytosomethingmuchlargerthanyourself.Findanissueyouareinterestedinandlearnmore.Volunteerorifyoucancontributealittlemoneytoacause.Whateveryoudodon'tbeabystander.Getinvolved.Youmayhavetheopportunitytomakeyourbiggestdifferencewhenyou'reolder.Butwhynotstartnow? Ourownexperienceworkingtogetheronhealthdevelopmentandenergythelasttwentyyearshasbeenoneofthemostrewardingpartsofourlives.Ithaschangedwhoweareandcontinuestofuelouroptimismabouthowmuchthelivesofthepoorestpeoplewillimproveintheyearsahead. 1WhatdoestheunderlinedpartinParagraph2referto? A.Yourlifestyle. B.Yourlifevalue. C.Yourtroubleinlife. D.Yourlifeexperience. 2Whydoestheauthorsaytheyareinspiredeveryday? A.Theypossessdifferentkindsofsuperpowers. B.Theyhavegotthepowertochangetheworld. C.Somepeoplearoundthemaremakingtheworldbetter. D.Therearemanypowerfulpeopleintheirlifeandwork. 3WhatdoestheauthorstressinParagraph5? A.Learningmoreandcontributingmoretoacause. B.Risingaboveselfandactingtohelpothers. C.Workinghardtogetabiggeropportunity. D.Tryingyourbesttohelpthepoor. 4Whatcanbeinferredfromthelastparagraph? A.Theauthorbelievesthelivesofthepoorestwillgetbetter. B.Muchmoreprogresswillbemadeinthenearfuture. C.Theworkonhealthisthemostvaluableexperience. D.People'seffortshavebeenmateriallyrewarded.
下列命题正确的是
若关于x的一元一次不等式组的解集是x≤a且关于y的分式方程-=1有非负整数解则符合条件的所有整数a的和为
singledose剂量ofanexperimentalvaccine疫苗canprotectmiceagainsttheZika寨卡virusraisingrenewedhopeofavaccineforhumanssayscientists.TheUSteamsaytheresultspublishedinNaturearestrikingandshouldencourageresearchefforts. Testsinhumanscouldbegininmonths.Butevenifthesegowellalicensedvaccineforwidespreadusetoprotectthoseatmostrisk—suchaspregnantwomen—wouldstillbeyearsawayexpertsadvise.ZikahasbeenspreadingacrossCentralandSouthAmericaandmostrecentlyAfrica.Morethan60countriesandterritoriesnowhavecontinuingtransmission传播ofthediseasewhichiscarriedbymosquitoes.Theviruscausesseriousbirthdamagesduringpregnancyandhasbeendeclaredaglobalpublichealthemergency. Nowdevelopingavaccineforpregnantwomentoprotecttheirunbornbabiesisaninternationalresearchpriority优先事项.USscientistsfromtheWalterReedArmyInstituteofResearchtheBethIsraelDeaconessMedicalCenterandHarvardMedicalSchooltestedtwotypesofZikavaccineinmice—onebasedonbitsofgenetic基因的codefromthevirusandanotherthatisaninactiveandthereforeharmlesscopyofZika.Bothworkedwellprotectingeverymousethatwasimmunisedagainstthevirus.IncomparisonallofthemicenotgiventhevaccinecaughtZikaaftertheywereexposedtoit. Researcherssaytheywillpushaheadwithdevelopingtheneededvirusvaccine.TherearemanyexistingvaccinesforotherdiseasethatusethistypeoftechnologywhiletherearerelativelyfewDNA—basedvaccines.Ofcoursefuturetestswillneedtocheckthevaccineissafeandeffectiveinhumansaswellashowlongtheimmunitymightlast. 1Ifthetestsinhumansgosmoothly. A.avaccineforuseinthelaboratorywillbestillbeyearsaway. B.pregnantwomeninAfricawillbethefirsttobenefitfromthevaccine. C.alicensedvaccinewillstillnotbeaccessibleinashortterm. D.TheZikaviruswillcauselessseriousbirthdefectsduringpregnancyinmonths. 2WhichofthefollowingstatementsisNOTtrue? A.manycountriesareactivelyinvolvedintheresearchoftheZikavaccine. B.USscientistshavetestedmorethantwotypesofZikavaccineinmice. C.NoneofthemicegiventhevaccinecaughtZika. D.Itisstillunknownwhetherthevaccineissafeandeffective. 3Whichcanbethebesttitleforthepassage? A.Zikavaccineworksverywellinmice B.Zikavaccinestillhasalongwaytogo C.InternationalresearchesintoZikahavepaidoff D.MoreattentionhasbeenpaidtoZikavaccine
HotelguestsinChinamightno1longhavetoworryaboutwaitinginlinetocheckin.AttheAlibaba'sfuturistichotelsguestscanscantheirIDstakeaphotoandinputpersonaldetailsusingamachinetocheck2theyin.Thesmartequipmentwillthenprovidearoomkeycardaftertheinformation3check.Theprocesswilltakelessthanaminuteaccordingtocompany.TargetingonlyChinesecustomersfornowthenewservicewillbe4gradualexpandedglobally.Therapidgrowthofmobileusageandmobilepaymentadoptioncanshow5convenientpeople'slifeisbecominginChina. Alibabaisn'ttheonlycompany6introduceshigh—techhotels.SmartLYZaShenzhen—basedcompanywhichfocused7developingAItechnologyandsmarthotelsopenedthefirsteverfullyautomated自动化hotelinChengduSichuanbackinJanuary.8travelcanbookaroomthroughSmartLYZ'sWeChatwebsitecheckinthroughafacialrecognitionmachineunlockthedoorwitha9givepasscodeorthroughitsmobileappandfinallycheckoutbypressingabuttonontheapp.TheAISmartRoomwillundoubtedlybeextremelyattractiveforguests10createthewayforanewlevelofmodernizationandconsumers'satisfaction.
三个形状大小相同的菱形按如图所示方式摆放已知∠AOB=∠AOE=90°菱形的较短对角线长为2cm.若点C落在AH的延长线上则△ABE的周长为cm.
如图在平面直角坐标系中二次函数y=-x2+2x+6的图象交x轴于点AB点A在点B的左侧 1求点AB的坐标并根据该函数图象写出y≥0时x的取值范围. 2把点B向上平移m个单位得点B1.若点B1向左平移n个单位将与该二次函数图象上的点B2重合若点B1向左平移n+6个单位将与该二次函数图象上的点B3重合.已知m>0n>0求mn的值.
Inthefarawaylandtherewasabeautifulkingdomwithitsuniquerule.Therulesaideveryonemaybecomethekingwithallofhisrightstogovernthecountryforfiveyears.Afterthathemustbecaughthisbodywillbetiedandhewillbethrownawaytoaremoteislandwherethejungleisthickandthereareplentyofwildanimalsandnohuman.Thenonebyonepeoplebecametheking.Thefirstmansaid'OkI'mreadytobetheking.'Andhebecameakingforfiveyears.Whathedidinhisfiveyearswasenjoyinghisposition.HethrewbigpartieswenttomanybeautifulplacesmarriedmanywomencollectedmanyluxuriousthingsanddidotherthingsthatpleasedhimselfThosewereallhedidandheneverpreparedanythingforhisfuture.Untilonedaythetimecame.Onemorningwhenthekingwokeupsuddenlystrongsoldierscametohispalaceandsaid'Wecamehereundertheorderofconstitution.Nowit'stimeforyoutobethrownawaytotheremoteisland.'Thekingwasn'tsurprisedbuthefeltthattimepassedbytoofast.Hehadenjoyedhimselfinthepastfiveyearsbutnowhehadtoaccepthisdestinywithtearsinhiseyes.Thesoldierssenthimtothedangerousislandandleft.Alltheyheardwasthevoicesofthewildanimalsandthelongscreamoftheformerkingandthensilentagain.Everyotherkingwasthesameuntilayoungmancameanddeclarehiswish.Bytheconstitutionhewasgrantedhiswish.Hewouldbeahugforfiveyearsbeforebeingthrownawaytotheisland.Butifotherkingswouldfollowtheirpassionforhavingfunhedidn't.Thekingwasalwaysseentobethinking.注意1所续写短文的词数应为150左右.2应使用5个以上短文中标有下划线的关键词语.3续写部分分为两段每段的开头语已为你写好4续写完成后请用下划线标出你所使用的关键词语.Paragraph1Andnotverylongafterthathemadeasurprisingdecision.Paragraph2Finallythetimecamewhenthekinghadtobethrownawaytotheisland.
计算 1|-6|-+1-0--3. 2-.
某公司快递员甲匀速骑车前往某小区送物件出发几分钟后快递员乙发现甲的手机落在公司无法联系于是乙匀速骑车去追赶甲.乙刚出发2分钟时甲也发现自己手机落在公司立刻按原路原速骑车回公司2分钟后甲遇到乙乙把手机给甲后立即原路原速返回公司甲继续原路原速赶往某小区送物件甲乙两人相距的路程y米与甲出发的时间x分钟之间的关系如图所示乙给甲手机的时间忽略不计.则乙回到公司时甲距公司的路程是米.
WangWhat'sG.P.A.? SmithG.P.A.stands1thegradequalitypointaverage.Qualitypointsareused2determinethestudents'rankinclassacademichonorsandacademicwarningandprobationorsuspension. WangHowcanIlistmyoverallundergraduateG.P.A.3use3digits? SmithIthinkit'sdifficulttochangeyourgrade4G.P.A.asoursystemofgradingisdifferentfrom5inyourcountry.I'dliketoadviseyoutosubmityour6officetranscripts文字稿ofallpreviousundergraduateandgraduatework. WangThat'sagoodidea.ItookTOEFLlastyear7Ihaven'ttakentheGRE.What'stobedone? SmithTheGREmay8requirebytheparticulargraduateorprofessionalprogram.YoushouldgoovertheTableofProgramcarefully.What'syourTOEFL9? Wang630. SmithWonderful.IngeneralthegraduatedivisionrequiresaTOEFLscoreofatleast575.Those 10TOEFLscoresareintherange500—575areadmittedconditionallyuponsuccessfulcompletionoffurthercourseworkinEnglishasasecondlanguage.
一个不透明的布袋内装有除颜色外其余完全相同的3个红球2个白球1个黄球搅匀后从中随机摸出一个球记下颜色后放回搅匀再从中随机摸出一个球则两次都摸到红球的概率为.
Bothmenandwomenarelivinglongerthesedaysinindustrializedcountries.1Ingeneraltheycanexpecttolivesixorsevenyearsmorethanmen.Onereasonforthisisbiological. Oneimportantbiologicalfactorthathelpswomenlivelongeristhedifferenceinhormonesbetweenmenandwomen.2Betweentheagesofabout12and50womenproducehormonesthatareinvolvedinfertility生育能力.Thesehormonesalsohaveapositiveeffectontheheartandbloodflow.Infactwomenarelesslikelytohavehighbloodpressureortodiefromheartattacks. 3Theyhelpthebodydefenditselfagainstsomekindsofinfections.Thismeansthatwomengenerallygersicklessoftenandlessseriouslythanmen.Thecommoncoldisagoodexamplewomenonaveragegetfewercoldsthanmen. 4Scientistsarestillnotexactlysurehowinfluenceagingbuttheybelievethattheydo.Somethinkthatawoman'sbodycellshaveatendency向toagemoreslowlythanaman's.Othersthinkthataman'sbodycellshaveatendencytoagemorequickly.5 A.Howeverwomenonaveragelivelonger. B.Thebiologicalfactorplaysanimportantpart. C.Womenarealsohelpedbytheirfemalegenes. D.Thefemalehormonesalsoprotectthebodyinanotherway. E.Recentresearchseemstosupportbothofthesepossibilities. F.Thereforewomenaremorehealthythanmenandcanliveabetterlife. G.Hormonesarechemicalswhichareproducedbythebodytocontrolcariousbodyfunctions.
车间有20名工人某一天他们生产的零件个数统计如下表. 1求这一天20名工人生产零件的平均个数. 2为了提高大多数工人的积极性管理者准备实行“每天定额生产超产有奖”的措施.如果你是管理者 从平均数中位数众数的角度进行分析你将如何确定这个“定额”
九章算术中有这样一个题今有甲乙二人持钱不知其数.甲得乙半而钱五十乙得甲太半而钱亦五十.问甲乙持钱各几何其意思为今有甲乙二人不知其钱包里有多少钱若乙把其一半的钱给甲则甲的数为50而甲把其的钱给乙则乙的钱数也为50问甲乙各有多少钱设甲的钱数为x乙的钱数为y则可建立方程组为
Isthereabestwaytopackclothes?Thefollowingideasareofgreathelptothosewhoarealwaysontheway. Wheretostart? 1Onceyouseehowmuchyoulayinfrontofyoubebraveandreduceaboutathird.Becausethetruthislikeyourwardrobeyouneverseemtouseasmuchasyoutake. Howtodealwithclothing? Startwithyourshoes.Putunderwearorsocksinsidethemtoholdtheshapeofyourshoes.Thusyoucanmakeuseofeverysquareinchofspace.Onceyourshoesarefirmlyinplacefillsmallgapswithverysoftitems.2 Layoutthefirstclotheswithoneendinsidethesuitcaseandtheotherenddroppingovertheedge.Putthenextclothesontopofthisbutplacethemtheotherwayaround.3Inthiswayyou'llgetanotherflatlayersoonFinallyonebyonefoldtheclothesbackin. Wheretoputnon—clothing? 4Theseawkwardshapeditemsaredifficulttopack.You'dbetterputthemtowardsthemiddlegivemaximumprotection.Remember.todoublebagyourtoiletrieskit洗漱袋toavoidspottingyourclothes. Toptips: Ifyoutakeabeltslipthemalongtheinsideofyourcase.5Thatwilltakemorespace.Nextusethehardshapeofthecasetoofferprotection.Leaveyourtoiletrieskitinyoursuitcasewhenyoureturnhome.It'sreadyforthenexttimeyoutravel. A.Don'trollbeltsup. B.Besuretoputawaysocks. C.Thisideawillcreateaflatfirstlayer. D.Andthencontinuelayingotherclothes. E.Thatwillmakethejobawholeloteasier. F.Layeverythingyouwanttotakewithyouonthebed. G.Non—clothingitemsarethingslikebookstoothbrushesandcameras.
某旅行团32人在景区A游玩他们由成人少年和儿童组成.已知儿童10人成人比少年多12人. 1求该旅行团中成人与少年分别是多少人 2因时间充裕该团准备让成人和少年至少各1名带领10名儿童去另一景区B游玩.景区B的门票价格为100元/张成人全票少年8折儿童6折一名成人可以免费携带一名儿童. ①若由成人8人和少年5人带队则所需门票的总费用是多少元 ②若剩余经费只有1200元可用于购票在不超额的前提下最多可以安排成人和少年共多少人带队求所有满足条件的方案并指出哪种方案购票费用最少.
Findingamountaingoatrestinghighonacliff悬崖mightthrillmanyofthemillionsoftouristswhovisitWyoming'sGrandTetonNationalParkeveryyearbutparkofficialssayitmightbetimeforthebeardedanimalstogo. TheproblemaccordingtotheparkisthatGrandTeton's100orsomountaingoatsthreatenabout80bighornsheep.Thebighornsheepnumberedasmanyas125justafewyearsago.Thestronggoatsspreaddiseaseandcompetewithbighornsheepforfood.Unlikesmall—sizedbighornsheepGrandTeton'smountaingoatsaren'tnativetothepark.Theywereintroducedtotheparkinthe1960s. GrandTetonspokeswomanDeniseGermannsaidWe'vegotamanagementresponsibilitytoprotectthenativespecies.Afterhearingfromthepublicontheproposal建议inJanuaryparkofficialsexpecttodecideassoonasmid—Februaryonwhattodoaboutthemountaingoats. Thegoatsarereproducingrapidly.Nowmightbethebesttimetoreducetheanimalsbeforethey'retoomanytobringundercontrolaccordingtotheParkService. Onewildlifebiologistwhostudiesbighornsheeppraisedtheproposal.Mountaingoats'originalhabitatisnowhereclosetowherethey'vebeenintroducedintheU.S.toprovidehuntingopportunitiessaidRobRoyRameyIIwithNederlandColorado—basedWildlifeScienceInternationalInc. WildlifemanagersshouldgetridofmountaingoatsnotonlyinGrandTetonbutelsewheretohelpstrugglingbighornsheepRameysaid.UnfortunatelystatewildlifeagenciessellnonnativewildlifeviewingopportunitiestothepublicRameysaid.Thisisnotazoointhewilderness.Itshouldreallybefornativewildlife. 1Whatcanbelearntaboutthebighornsheepinthepark? A.Theirsizeishuge. B.Theirnumberisdecreasing. C.Theyarrivedinthe1960s. D.Theythreatenlocalspecies. 2Howdidthepublichelpparkofficialsprotectthebighornsheep? A.Byprovidingsuggestions. B.Bydrivingawaymountaingoats. C.Byvolunteeringinthepark. D.BytakingoverGrandTetonNationalPark. 3WhatisGermann'sattitudetowardsthebighornsheep? A.Curious. B.Proud. C.Surprised. D.Concerned. 4Whatwasthepurposeofbringinginmountaingoatsinthebeginning? A.Toofferhuntingchances. B.Tosellnonnativewildlife. C.Tosatisfywildlifemanagers. D.Toincreasediversitiesofsheep.
2019OscarsAcademyAwardNominees提名forBestPicture BlackPanther Type:Adventure RunningTime:134min. ReleaseDate:February162018 Currentrank:★★★★ Director:RyanCoogler Actors:ChadwickBosemanMichaelB.Jordan WithhisfatherhavingdiedinCaptainAmerica:CivilWarT'ChallaisthenewruleroftheadvancedkingdomofWakanda.Asthekingwheneverachallengerforthecrownannounceshisintentionshemustgiveuphispowersandtakethemoninaphysicalchallenge. TheFavorite Type:Drama RunningTime:120min. ReleaseDate:November302018 Currentrank:★★★ Director:YorgosLanthimos Actors:EmmaStoneRachelWeisz Intheearly18thcenturywithEnglandandFranceatwarafragileQueenAnneoccupiesthethroneasherclosefriendLadySarahChurchillgovernsthecountryinhersteadwhiletendingtoAnne'sillhealthandchangeabletemper. GreenBook Type:Drama RunningTime:130min. ReleaseDate:November212018 Currentrank:★★★★★ Director:PeterFarrelly Actors:ViggoMortensenMahershalaAli TonyLipanuneducatedItalian—Americanwho'sknownforusinghisfiststogethiswayishiredtodriveworld—classfamouspianistDonShirleyonaconcerttourfromManhattantotheDeepSouth.TheymustrelyontheNegroMotoristGreenBooktoguidethemtothefewsettlementsthatwerethensafeforblacks. AStarisBorn Type:Musical RunningTime:135min. ReleaseDate:October52018 Currentrank:★★★★ Direct:BradleyCooper Actors:BradleyCooperLadyGaga WhencountrymusicstarJacksonMainestopsatabarforadrinkafteraconcerthe'sbothentertainedandattractedbyyoungnightclubsingerAlly.Hediscoversthatshewritessongsaswellasbeingatalentedsingerbuthasn'thadabreakbecauseofherlooks. 1Whichfilmistheleastpopularamongaudience? A.BlackPanther. B.TheFavorite. C.GreenBook. D.AStarisBorn. 2Thefilmabouttherightsofblackpeoplebelongsto. A.adventure B.musical C.drama D.comedy 3Whoworksasadirectorandactor? A.RyanCoogler. B.YorgosLanthimos. C.PeterFarrelly. D.BradleyCooper.
如图在平行四边形ABCD中点E在边BC上连结AEEM⊥AE垂足为E交CD于点MAF⊥BC垂足为FBH⊥AE垂足为H交AF于点N点P是AD上一点连接CP. 1若DP=2AP=4CP=CD=5求△ACD的面积. 2若AE=BNAN=CE求证AD=CM+2CE.
如图△ABO∽△CDO若BO=6DO=3CD=2则AB的长是
每年夏季全国各地总有未成年人因溺水而丧失生命令人痛心疾首.今年某校为确保学生安全开展了“远离溺水•珍爱生命”的防溺水安全知识竞赛.现从该校七八年级中各随机抽取10名学生的竞赛成绩百分制进行整理描述和分析成绩得分用x表示共分成四组A.80≤x<85B.85≤x<90C.90≤x<95D.95≤x≤100下面给出了部分信息 七年级10名学生的竞赛成绩是998099869996901008982 八年级10名学生的竞赛成绩在C组中的数据是949094 七八年级抽取的学生竞赛成绩统计表 根据以上信息解答下列问题 1直接写出上述图表中abc的值 2根据以上数据你认为该校七八年级中哪个年级学生掌握防溺水安全知识较好请说明理由一条理由即可 3该校七八年级共720人参加了此次竞赛活动估计参加此次竞赛活动成绩优秀x≥90的学生人数是多少
如图在平面直角坐标系中矩形ABCD的顶点AD分别在x轴y轴上对角线BD∥x轴反比例函数y=k>0x>0的图象经过矩形对角线的交点E.若点A20D04则k的值为
计算 1x+y2-y2x+y 2a+÷
ISMisalargecompanyinSt.LouisMissouributthetopleadersarenotsatisfiedwiththeperformanceofitsstaff.Onedaynottoolongagotheemployeesreturnedfromtheirlunchbreakandweregreetedwithasignonthefrontdoor.Thesignsaid1Weinviteyoutojointhefuneralintheroomthathasbeenpreparedinthegym. Atfirsteveryonewassadtohearthatoneoftheircolleagueshaddiedbutafterawhiletheystartedgettingcuriousaboutwhothispersonmightbe.Theexcitementgrewastheemployeesarrivedatthegymtopaytheirlastrespects.Everyonewondered2Wellatleasthe'snolongerhere! Onebyonetheemployeesgotclosertothecoffinandwhentheylookedinsideittheysuddenlybecamespeechless.Theystoodoverthecoffinshockedandinsilenceasifsomeonehadtouchedthedeepestpartoftheirsoul.3TherewasalsoasignnexttothemirrorthatsaidThereisonlyonepersonwhoiscapabletosetlimitstoyourgrowthitisYOU. Youaretheonlypersonwhocanrevolutionizeyourlife. 4 Youaretheonlypersonwhocaninfluenceyourhappinessyourrealizationandyoursuccess. Yourlifedoesnotchangewhenyourbosschangeswhenyourfriendschangewhenyourparentschangewhenyourpartnerchangeswhenyourcompanychanges. YourlifechangeswhenYOUchangewhenyougobeyondyourlimitingbeliefs5 A.Therewasamirrorinsidethecoffineveryonecouldseethepersonwhopassedaway B.Whoisthepersonthatpassedaway? C.whenyourealizethatyouaretheonlyoneresponsibleforyourlife. D.Amirrorinsidethecoffineveryonewholookedinsideitcouldseehimself E.Yesterdaythepersonwhohasbeenlimitingyourgrowthinthiscompanypassedaway. F.Youaretheonlypersonwhocanhelpyourself G.Whoisthispersonthatwaslimitingyourprogress?
Thegiantpanda1lovebypeoplethroughouttheworld.Chinesescientists2recenthadachancetostudyawildfemalepandawithanewbornbaby.Shewasavery3caremother.For25dayssheneverleftherbabynoteventofindsomething4eat!Shewouldnotletanyotherpandascomenear.Shelickedthebabyconstantlytokeepitclean.Anysmellmightattractnatural5enemythatwouldtrytoeatthelittlepanda.Themotherheldthebabyinherfrontpawsmuchthewayahumandoes.6itcriedsherockeditbackandforthandgaveitlittlecomfortingpats.Themothercontinuedtocarefortheyoungpanda7morethantwoyears.Bythattimethepandanolongerneeded8itmotherforfood.Howeveritstayedwithherandlearnedaboutthewaysoftheforest.Thenaftertwoandahalfyearsthemother9drivetheyoungpandaaway.Itwastimeforhertohaveanewbaby10itwasalsotimefortheyoungpandatobeindependent.
下列各数中比-1小的数是
在初中阶段的函数学习中我们经历了“确定函数的表达式--利用函数图象研究其性质一一运用函数解决问题“的学习过程.在画函数图象时我们通过描点或平移的方法画出了所学的函数图象.同时我们也学习了绝对值的意义|a|=. 结合上面经历的学习过程现在来解决下面的问题在函数y=|kx-3|+b中当x=2时y=-4当x=0时y=-1. 1求这个函数的表达式 2在给出的平面直角坐标系中请用你喜欢的方法面出这个函数的图象并写出这个函数的一条性质 3已知函y=x-3的图象如图所示结合你所画的函数图象直接写出不等式|kx-3|+b≤x-3的解集.
假定你是李华想邀请网友Peter下周六参观你校举办的科技小发明technologygadgets展览.请给他写封邮件内容包括: 1.具体时间和地点; 2.展览目的和内容. 注意: 1.词数100左右; 2.可以适当增加细节以使行文连贯;
计算π-30+-1=.
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