首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
在研究某电路元件的伏安特性时，得到如图乙所示的伏安特性曲线Ⅰ．备选器材有：电压表V1（量程为3V，内阻约为6kΩ）、电压表V2（量程为15V，内阻约为150kΩ）、电流表A1（量程为150mA，内阻...
查看本题答案
包含此试题的试卷
高三下学期物理《》真题及答案
点击查看
你可能感兴趣的试题
当电阻元件的伏安特性曲线是时该元件称为线性电阻
直线
曲线
直线或曲线
复线
图a是白炽灯L1220V100W和L2220V60W的伏安特性曲线1图中曲线______表示灯L1的
如图所示直线A为电源的伏安特性曲线直线B为电阻R的伏安特性曲线用该电源和该电阻组成一个闭合电路电源
某学习小组探究电学元件的伏安特性曲线1甲同学要描绘一个标有3.6V1.2W的小灯泡的伏安特性曲线除了
若电阻元件的伏安特性曲线为一条经过原点的直线称为线性电阻否则为非线性电阻
如图B-7所示图线a是某一蓄电池组的伏安特性曲线图线b是一只某种型号的定值电阻的伏安特性曲线.若已知
某一热敏电阻其阻值随温度的升高而减小在一次实验中将该热敏电阻与一小灯泡串联通电后各自的电流I.随所加
图线b是小灯泡的伏安特性曲线，图线a是热敏电阻的伏安特性曲线
图线a是小灯泡的伏安特性曲线，图线b是热敏电阻的伏安特性曲线
图线中M.点对应的状态，表示小灯泡的阻值大于热敏电阻的阻值
图线中M.点对应的状态，表示小灯泡的功率与热敏电阻的功率相等
图a是白炽灯L1220V100W和L2220V60W的伏安特性曲线1图中曲线______表示灯L1的
如图所示为电阻R1和R2的伏安特性曲线并且把第一象限分为ⅠⅡⅢ三个区域.现把R1和R2并联在电路中消
特性曲线在Ⅰ区，P1＜P2
特性曲线在Ⅲ区，P1＜P2
特性曲线在Ⅰ区，P1＞P2
特性曲线在Ⅲ区，P1＞P2
若电阻元件的伏安特性曲线不随时间变化该元件为时不变电阻反之为时变电阻
如图所示是电阻R1和R2的伏安特性曲线且把第一象限分了ⅠⅡⅢ三个区域现将R1和R2并联在电路中小号的
特性曲线在Ⅰ区P1
特性曲线在Ⅲ区P1
特性曲线在Ⅰ区P1>P2
特性曲线在Ⅲ区P1>P2
二极管的伏安特性曲线
如图所示直线
为电源的伏安特性曲线，直线
为电阻R.的伏安特性曲线，用该电源和电阻组成一个闭合电路，则（ ）（多选） A.电源的总功率是18W、输出功率是12W B. 电源的总功率是6W、输出功率是4W
电源的电动势是3V、内阻是1Ω
R.的阻值是1Ω
在描绘小灯泡额定电压是3.8V的伏安特性曲线的实验中1如果既要满足测量要求又要减小测量误差在如图所示
如图7所示直线A.为电源的伏安特性曲线直线B.为电阻R.的伏安特性曲线用该电源和该电阻组成一个闭合电
图a是白炽灯L1220V100W和L2220V60W的伏安特性曲线1图中曲线______表示灯L1的
某学习小组探究电学元件的伏安特性曲线①甲同学要描绘一个标有3.6V1.2W的小灯泡的伏安特性曲线除了
某学习小组探究电学元件的伏安特性曲线.①甲同学要描绘一个标有3.6V1.2W的小灯泡的伏安特性曲线除
电阻元件的伏安特性曲线是时称为线性电阻
直线
曲线
直线或曲线
导线
如图7所示直线A.为电源的伏安特性曲线直线B.为电阻R.的伏安特性曲线用该电源和该电阻组成一个闭合电
热门试题
更多
BeyingOperarepresentsthefinestcombinationofliteraturemusicdancekungfufineartsandmanyotherarts.Itswayofperformingisdifferentfromoperaanddrama1 BeyingOperaisakindofartthatpaysequalattentiontosingingspeakingactingandfighting.2Meanwhile.BeijingOperaprovidestheopportunitytoappreciatethepleasingartisticbalanceofthedancethestrengthandmusicevenfromonlyoneact3AccordingtothehistoricalrecorditdatesbacktothemiddleperiodoftheQingDynasty.Inthe55thyearruledbytheEmperorQianlongthemostfamousfourtheatricalgroupsinAnhuiwenttoBeijingtoshowtheiroperaperformanceandthengotagreatsuccess.ThenbasedonAnhuiOperaandHanOperaandalsomixedwithcharacteristicsofBeijingdialectBeijingOperawasformed4 TheBeijingOperawasofficiallyformedafterthe20thyearoftheEmperorDaoguang1840.Atthattimetheformsofeachkindofarias唱腔andthelanguagecharacteristicofBeijingOperaoriginallycameintobeing.NewchangesappearedinBeijingOpera'sroles.5Laterthefirstgenerationoftheoperaactorsalsoappeared. A.Beijingoperaisakindofmodemopera. B.ActuallyBeijingOperahasitsowncharacters. C.ManyrolesoftheBeijingOperahadappeared. D.BecauseitwaspopularinBeijingitspreadnationwide. E.ManypeoplewonderwhatistheoriginoftheBeijingOpera. F.Itenablestheaudiencetobeinspiredbylanguagemusicandfinearts. G.AlthoughinwasformedinBeijingitdidn'thaveitsoriginsinBeijingtotally.
TheothernightIhadtogotoameetingwhichlastedpastmydaughter'sbedtime.I1homeandwasbrushingmyteethwhenI2andthereonthebathroommirrorwasanoteinthe3ofaheart.ItsaidHiMom!ILoveYou.Laurel.4Icutaheartoutofapieceofpaperandpasted贴an5nexttoherssayingILoveYoutooLaurel.LoveMomwhichshe6thenextmorning. Ourfamilyhas7thatbyintegrating互相writingintoour8activitieswebecomemorethoughtfulofeachother.Meanwhileourdaughterislearningtoenjoywritingandbecomingan9writer. WhileteachinginaprimaryschoolI10howinfluentialparentscanbeaschildrenlearntowrite.11whenourdaughterfirstbegantoscribble乱涂Ibecame12byherwork.Iofferedpraiseforher13forIfoundthatscribblingisfarmorecomplexandimportantthanIhad14.Itwasobviousthatherscribbles15beinglovelyartobjectsshowedalotabouther16oftheworldofwriting. Graduallyourfamilybeganwritingagreatdeal.IsensedthatwritinghelpedLaurellearn17toread.Asamatteroffactby18myownchildandherfriendsandbyreadingprofessionalbooksIbecamemoreandmore19abouthowwritingdevelopsandhow20canhelpchildrenbecomeeagerwriters. 1A.left B.returned C.missed D.headed 2A.turnedup B.turneddown C.lookedup D.lookedon 3A.size B.shade C.model D.shape 4A.Immediately B.Suddenly C.Finally D.Usually 5A.picture B.article C.note D.page 6A.felt B.wrote C.read D.heard 7A.found B.imagined C.dreamed D.doubted 8A.boring B.useful C.daily D.personal 9A.important B.ordinary C.poor D.skilled 10A.learned B.regarded C.considered D.discussed 11A.Yet B.Though C.But D.So 12A.disappointed B.attracted C.puzzled D.worried 13A.effects B.efforts C.suggestions D.methods 14A.cared B.insisted C.realized D.proved 15A.besides B.farfrom C.insteadof D.lessthan 16A.arguments B.fear C.understanding D.dislikes 17A.when B.how C.what D.whether 18A.noticing B.discovering C.checking D.observing 19A.particular B.clear C.anxious D.crazy 20A.teachers B.friends C.books D.parents
小红将30g氯酸钾和二氧化锰的固体混合物加热制取氧气待反应完全后将试管冷却称量得到固体的总质量为20.4g请计算 1生成氧气的质量是多少克 2原混合物中氯酸钾的质量是多少 3混合物中二氧化锰的质量是多少写出计算过程
Ifyoufindyourselflosingthemotivationtodoyourhomeworkyouarenotalone.36Ifyouwanttogetgoodgradesofcourseyoumustdoyourhomework.Here'showtofindthemotivation 37Ifyouaretootiredyou'lljustwanttowatchtelevisioninsteadofthinkingaboutyourhomework.Plusyou'llhaveamucheasiertimerememberingwhatyou'vereadifyouareenergetic. Turnoffthedistractions分散注意力的事.Turnoffthemusicandtelevision.Ifyoudon'tneedyourcomputerortheInternetforyourhomeworkturnitoffaswell.Makesureyourstudyareaisfreefromdistractions.38 Startrightaway.Doingyourhomeworkrightafteryougethomecankeepyoufromfallingintothetrapofendlesshoursofdistractions.39AlthoughitmaynotbepopulartodoyourhomeworkonaFridaynightyou'llhavetherestoftheweekendfree. Createaschedule.40Planoutwhenyouwilldoeachpartoftheassignment.Splitthemintosmallpartssothatyoucanfeelgoodaboutcompletingeachpart.Itcanbemucheasiertodealwithabigassignmentorprojectonceyou'vesplititintomanageablepieces. Homeworkcanbeboringbutit'sanecessaryevilifyouwanttopassyourclasses.Onceyoumakeaplantofinishyourhomeworksticktoit. A.Getenoughrest. B.Gatheryourmaterials. C.Writeallofyourassignmentsonachecklist. D.Manystudentsdelayindoingtheirhomework. E.You'lleasilygetdistractedandavoidfinishingyourhomework. F.Plusthematerialyou'velearnedwillstillbefreshinyourmind. G.You'llbeabletofinishyourhomeworkmuchfasterifyoucanfocusonit.
Yoursuggestionwillbetakenintoconsider.
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∧并在其下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下划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. DearAbby Howareyou?TodayI'vegotawonderfulnewstotellyou.IhaveofferedascholarshipatauniversityinAustraliaformyfurthereducation.OnehundredandtwentystudentstookexamforitbutonlyafewwaschosenandIwasoneofthem.Howevermyparentsarenothappyaboutit.Theyarestrongagainstmegoingthere.TheysayitistoofarawaythattheywillnotseemeforawholeyearandtheyareafraidofIwillfeellonely.Theycan'timagineagirlsoyounglivealone.Theyaskmestudyinthecapitalinstead.ThenI'llbeabletocontinuelivingwiththem.HowcanIpersuadethemtoacceptthefactIhavegrownup? Bestwishes Jane.
下列说法不正确的是
Wewillfeelenergyafteragoodrest.
Weatherpermitwewillgooutforawalk.
阅读下面材料在题后空白处填入适当的内容每空一词或括号内单词的正确形式. Itis2years61wehadacleaningladyandforsomereasonmyhusbandhasbecomeverydemandingtowardher.Hebelievesshedoesnotworkaswellassheusedto.Hecomplainsalotandhasdecidedtocomplaintoher.YesterdayItriedseveral62timetodiscusswithhimmy63satisfywithherworkbuthewasalittlebitupset.ThismorningIlookedatthehouseandallthecleaningshe64dobefore.Ithoughtitwasunfairtocomplainbecauseshewasdoingsuch65greatjob.SoIfoughtforheragain66sayitwasunnecessarytocomplain.Shewasdoingwellandshedeservedtoget67paymoreandtoreceivesomeextramoneyforthenewyear.And68finalmyhusbandtoldherthatwehaddecidedtopayhermore69wasasurprisetoher. I'mveryhappyIhaveprotectedthisladyfromunfairwordsandthatwearetreatingherfairlynowanddoingsomethingtoshortenthegap70therichandthepoor.
Iamnotpersuadedbythisargue.
Spaceiswhereourfutureis﹣tripstotheMoonMarsandbeyond.Mostpeoplewouldthinkthatasidefromcomets彗星andstarsthereislittleelseoutthere.Butsinceourspacejourneystartedwehaveleftsomuchtrashtherethatscientistsarenowconcernedthatifwedon'tcleanitupwemayallbeinmortal致命的danger. Thefirstpieceofspacejunkwascreatedin1964whentheAmericansatelliteVanguardIstoppedoperatingandlostitsconnectionwiththegroundcenter.HoweversinceitkeptorbitingaroundtheEarthwithoutanyconsequencesscientistsbecameincreasinglycomfortableabandoningthingsthatnolongerservedanyusefulpurposeinspace. Itisestimatedthattherearenowover500000piecesofman﹣madetrashorbitingtheEarthatspeedsofupto17500milesperhour.Thejunkvariesfromtinypiecesofpaintchippedoffrocketstocamerashugefueltanksandevenodditemslikethemillion﹣dollartoolkitthatastronautHeidemarieStefanyshynPiperlostduringaspacewalk. Themajorproblemwiththespacetrashisthatitmayhitworkingsatellitesanddamagetravelingspacecraft.MoreoverpiecesofjunkmaycollidewitheachotherandbreakintopieceswhichfallbacktotheEarth.Toavoidthisscientistshaveinventedseveralwaysforclearingthesky.Groundstationshavebeenbuilttomonitorlargerpiecesofspacetrashtopreventthemfromcrashingintoworkingsatellitesorspaceshuttles.Futureplansincludeacooperativeeffortamongmanynationstostoplitteringinspaceandtocleanupthetrashalreadythere. 1Whatwasthefirstpieceofman﹣madespacetrash? A.Acamera. B.Atoolkit. C.Afueltank. D.Abrokensatellite. 2WhywerescientistsNOTconcernedaboutspacetrashinthebeginning? A.Itnolongerservedanyusefulpurpose. B.ItwasmillionsofmilesawayfromtheEarth. C.Itdidnotcauseanyproblems. D.Itwasregardedassimilartocometsandstars. 3Whichofthefollowingstatementsistrueaboutspacejunk? A.Itishugeheavymachines. B.Itneverchangesposition. C.ItfloatsslowlyaroundtheEarth. D.Itmaycauseproblemsforspaceshuttles. 4Whathasbeendoneaboutthespacetrashproblem? A.Scientistshavecleanedupmostofthetrash. B.Largepiecesofspacetrasharebeingcloselywatched. C.Manynationshaveworkedtogethertostoppollutingspace. D.Groundstationsarebuilttohelpstorethetrashproperlyinspace.
LanternFestivalfalls1thefifteenthdayofthefirstlunarmonth.Thisisthefirstfullmoonofthenewyearrepresentingunityandperfection.Thisfestivalalsomarksthe2officeendofthelongholiday. Therearemanylegends传说relatedtotheoriginsofLanternFestival. Accordingtoonelegendonceinancienttimesacelestial天上的swancameintothehumanworldwherei3shootdownbyahunter.TheJadeEmperorthe4highgodinHeavenwasangryaboutthis.He5plananattackonEarthonthefifteenthdayofthefirstlunarmonthwithorderstokillallpeopleandanimals.Buttheothercelestial6begintodisagreewithhimandriskedhislife7warnthepeopleofEarth.As8resultbeforeandafterthefifteenthdayofthefirstmontheveryfamilyhungredlanternsoutsidetheirdoorsandsetofffirecrackersandfireworks烟花爆竹givingtheimpression9theirhomeswerealreadyburning.BysuccessfullytrickingtheJadeEmperorinthiswayhumanbeingsweresavedfrom20destroy
假如你是李华近年来很多大城市交通拥堵严重影响了人们的生活和经济发展.请针对此现状用英语给某英语报社写封信谈谈你的看法和建议. 注意 1.词数100左右 2.可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. Deareditor Iamwritingtoyoutotalkabouttheheavytraffic. Idohopemysuggestionswillbetaken. Yours LiHua.
五一长假小明和家人到总溪河去游玩． 1他们携带以下物品这些物品中主要材料不属于有机合成材料的是填对应字母 a．塑料水壶b．涤纶防晒衣c．纯棉太阳帽 2小明想知道总溪河的水是硬水还是软水可用检验 3小明口渴买了一瓶矿泉水矿泉水属于填“纯净物”或“混合物” 4中午小明用餐时选择的是“一碟青菜搭一个馒头”这种“经典”搭配主要补充的营养成分是 糖类．
WelcometoTheMetropolitanMuseumofArt TheMetwhichisshortforTheMetropolitanMuseumofArtpresentsover5000yearsofartfromaroundtheworldforeveryonetoexperienceandenjoy.MillionsofpeopletakepartinTheMetexperienceonlineoroffline. Sinceitwasfoundedin1870TheMethasalwaystriedtobemorethanastoreroomofrareandbeautifulobjects.EverydayartcomesaliveintheMuseum'sgalleriesandthroughitsexhibitionsandeventsrevealing显示bothnewideasandunexpectedconnectionsacrosstimeandacrosscultures. Notes I.HowcanIobtainpermissiontofilmorphotographatTheMetropolitanMuseumofArt? Pleasee﹣mailadetailedrequesttocommunications@metmuseum.org. II.HowcanIobtainsuitableimagestoreproduceinamagazinenewspaperorwebsite? ToviewandrequestpressimagesfortheMuseum'scurrentandupcomingexhibitionsandnewsstoriesabouttheMetpleasesigninorregisterforapressaccountinthePressImagessectionoftheonlinePressRoom. III.AllotherimagerequestsshouldbedirectedtoArtResourcethroughitswebsitehttp://www.artres.combytelephoneat212﹣505﹣8700ore﹣mailatruests@artres.co.YoumayalsosubmityourrequestusingtheImageRequestFormavailableontheMet'swebsite. IV.IfyouhaveanyotherquestionspleasecontacttheMuseum'sDigitalDepartment DigitalDepartment TheMetropolitanMuseumofArt 1000FifthAvenue NewYorkNewYork10028﹣0198 Telephone212﹣650﹣2550 E﹣mailprivacypolicy@metmuseum.orp 21.Whattypeofwritingisthistext? A.Abusinessguide.B.Anadvertisement.C.Aresearchreport.D.Anartsurvey. 22.WhatcanwelearnabouttheMetfromthetext? A.TheMethasahistoryof5000years. B.TheMetstopscollectingartsrightnow. C.PeoplestartedtovisittheMetonlinetobuyobjects. D.PeoplecannottakeaphotowithoutthepermissionoftheMet. 23.Whatshouldyoudoifyouwanttohaveimagesusedforamagazine? A.Telephoneat212﹣505﹣8700. B.ContacttheMuseum'sDigitalDepartment. C.WriteanapplicationattheonlinePressRoom. D.E﹣mailtocommunications@metmuseum.org.
Theworld'sfirstSkyPoolhasbeenuncoated曝光﹣andit'llgiveanyoneatouchofdizziness眩晕unlessheorsheisnotbotheredbyheights. Situatedinthecapital'snewriversidedistrictbesideBatterseaPowerStationtheglasspoolhanging10storeysor110feetupasabridgebetweentwoapartmentbuildingsis25mlong5mwideand3mdeepwithawaterdepthof1.2m.Swimmerswillbeabletolookdown35meterstothestreetbelowastheytakeadipwithonly20cmofglassbetweenthemandtheoutsideworld.It'sevengotabarfoldingchairsandanorangegarden. ThepoolwillbepartofEmbassyGardensatNineElmsahuge￡15billionbuildingprojectbesidethenewAmericanEmbassyinsouth﹣westLondon.Theprojectiscreatingthousandsofapartmentsthesmallestofwhichareexpectedtocostnearly$1millionandthepoolwillonlybeopentotheapartments'owners. EmbassyGardenstakesdesigninspirationfromtheMeatpackingDistrictofNewYorkwithfloortoceilingwindowsandbrickfrontages.ThedesignerSeanMulryandesiredtopushtheboundariesinthecapabilityofconstructionandengineeringanddosomethingthathadneverbeendonebefore.TheSkyPool'stransparentstructureistheresultofsignificantadvancementsintechnologiesoverthelastdecade. TheexperienceofthepoolwillbetrulyuniqueanditwillfeellikefloatingthroughtheairincentralLondon. ThosepeopleluckyenoughtoswimtherewillhaveaperfectviewofthePalaceofWestminsterandtheLondonEye.Itwillbeasellingpointfordeveloperswhenthesecondstageofthedevelopmentisreleasedtomarket. 28.WhocanswimintheSkyPool? A.AnyoneatNineElms. B.VisitorstoLondon. C.PeoplelivinginEmbassyGardens. D.Thosewhoarenotterrifiedofheights. 29.PeopleluckyenoughtoswimintheSkyPoolcandothefollowingexcept. A.drinkingwithfriends B.experiencingdivingandsurfing C.appreciatingtheLondonEye D.sittingintheorangegarden 30.Whatdoweknowfromthetext? A.ThepoolliesinthecentreofLondon. B.Thepoolis25metresabovetheground. C.ThepoolwassimilartoNewYork'smodernconstructions. D.ThepoolishelpfulforsellingapartmentsinEmbassyGardens. 31.Wecaninferfromthetextthat. A.theapartmentsinEmbassyGardensarefairlyexpensive B.thenewAmericanEmbassyhasbeenmovedaway C.NineElmsisastreetinEmbassyGardens D.buildingthepoolisnotacomplexjob.
废旧金属可回收利用某化学兴趣小组用合金废料含FeCu和Al制取FeSO4溶液和回收金属铜实验流程如图所示部分生成物已略去．已知2Al+2NaOH+2H2O═2NaAlO2+3H2↑ 1单质铁的金属活动性比铜填“强”或“弱” 2操作Ⅰ的名称操作Ⅱ用到的玻璃仪器有烧杯玻璃棒和填仪器名称 3若取FeSO4溶液适量滴入BaCl2溶液发生反应的化学方程式为该反应属于基本反应类型中的反应 4步骤B的化学方程式为 5铝制品在空气中耐腐蚀的原因是．
假定你是李华暑假想去一家外贸公司兼职已写好申请书和个人简历resume.给外教MrJenkins写信请他帮你修改所附材料的文字和格式format 注意 1.词数100左右 2.可以适当增加细节以使行文连贯.
AnorganizationEyeCare4Kidsisbringingmuch﹣neededeyecaretopoorkids.Itprovidesfreeeyeexaminationsforkidsfrompoorfamilies.FoundedbyJosephCarbonein2001theorganizationhashelpedaround100000childreninUtahandNevada. NowCecilSwyersabiomedicalengineerwhowasonceapoorchildhimselfisbringingthecharity'sservicestopoorstudentsinArizonasothatvisionimpairment视力受损doesn'tstandinthewayoftheireducation. EyeCare4Kidsisbringingeyecareandglassestofamiliesthatwouldn'thavethemeanstopayforthemsaidMarioVenturafromIsaacElementarySchoolDistrictthefirstschooldistrictinArizonatoreceiveitsservices. Goodvisionisimportanttoachild'slearningexperience.Accordingtoastudyupto80percentoflearninghappensthroughsightforchildrenbetween6and18yearsold.Withoutpropereyecareit'sdifficultforstudentstolearnbetterandsucceed. SwyersishopingthatbybringingtheorganizationtoArizonahe'llhelpalotmorestudents.Heteamedupwithtwootherorganizationstogetdoctorstovolunteertheirtimewiththegroup.UsingEyeCare4KidsmobileclinicSwyersvisitedAltaE.ButlerElementarySchoolandhasalreadyhelped40students. Theschoolwasgratefultoreceivetheeyecareespeciallysincetheservicescametothem.It'sisgreatforussaidAssistantPricipalCindyAlonso. SwyersishopingtobringEyeCare4Kids'servicestootherschoolsinthestate.Hesaidthathopefullyhisworkwillhaveapositiveeffectonstudents'futures.Ifwecanhelpstudentswhilethey'reyoungwecanmakeadifferenceintheirfutureshesaid. 1EyeCare4Kidshelpsstudentsby. A.givingthemsunglassesforfree B.offeringmoneytotheirfamilies C.examiningtheireyesforfree D.solvingtheirproblemsinstudy 2Whoisinchargeoftheorganization'sservicesinArizona? A.JosephCarbone. B.CecilSwyers. C.MarioVentura. D.CindyAlonso. 3Wheredostudentstakeaneyeexamination? A.Intheclassroom. B.Inthemobileclinic. C.Inthenearbyhospital. D.Intheplaceswherestudentslive. 4Whatwouldbethebesttitleforthetext? A.EyeCare4KidsWasFoundedbythePoor B.EyeCare4KidsDevelopsataFastSpeed C.EyeCare4KidsPoorKidsSucceed D.EyeCare4KidsFightsforBetterEducation
我国医学家屠呦呦因研制新型抗疟药青蒿素和双氢青蒿素而获得2015年诺贝尔生理学和医学奖．已知青蒿素的化学式为C15H22O5则关于青蒿素的说法错误的是
阅读下面短文根据所给情节进行续写使之构成一个完整的故事.Lauriesatquietlyintheemptydressingroomattheice﹣skatingrink溜冰场.Shehadnotbeenskatinginanycompetitionsinceherleftkneewasbadlyinjuredinanaccidentsixmonthsago.AsshewaitedforherturntoskateLauriewasverynervous.Sheknewthattodaywasaveryimportantdayinhercomeback.'IfIcanwintoday'shethought'IcanskateintheWorldCupnextyearandthenmaybeIcanmakeittotheOlympics.'LauriewasjusttoldthatshehadatoughcompetitionthisyearagirlfromConnecticutnamedJinnyJordanwhowasreallystrongineverything.'Sheistheoneyouhavetobeatthisyear.'thecoachsaid.MinuteslaterthedoorswungopenandLauriesawayoungwomanwhowasaboutherownage.Theyoungwomandumpedsomeofherbelongingsontoachair.Thebagfelltothefloorwithathud.LauriefeltuncomfortableasshelookedatJinny.'Sothisismycompetition'thoughtLaurie.'BecauseofherImaylosetonight.''Thiscostumewasmymom'sidea'Jinnystaredtheconversationlookingdownatherredwhiteandblueskatingdress.'Ilooklikeaflag.'Lauriecouldn'tkeepfromsmiling.ShepointedtoJinny'sskatingbag.'Somestufffelloutofyourbag.'Lauriesaid.Jinnylookedattheclothingandequipmentthatlayscatteredonthefloor.Asshebegantogatherherbelongingsthedooropened.'Jinny'calledsomeone'You'dbettergivethetapeofyourmusictothesoundengineerrightaway.''IthoughtIgavehimmymusictapehalfanhourago'saidJinny.'Tellhimit'sthegreenboxwithmyinitials姓名的首字母writteninwhiteintheright﹣handcorner.''Heclaimsyounevergaveittohimandhe'sgettingangry.''ThenIdon'tknowwhatididwithit'saidJinnyhurryingout.Laurieknewthatmusicwasnearlyasimportanttotheprogramasskatingitself.Ifshelosthermusictapeshemightaswellforgetaboutskating.Lauriestoodupandwalkedtothechairtodoafewmorekneebends.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.Paragraph1Suddenlyshesawsomethingsmallanddarkgreenbehindthelegofthedressingtable.____Paragraph2FeelingrelievedLaurieskatedquicklytothecenteroftherinkaftertheannouncerfinallycalledhername.____
LastspringIwasfortunatetobechosentoparticipateinanexchangestudyprogram.InmyapplicationletterIwascarefulto1howmuchIwantedtoseeFranceevidentlymyexcitementreallycamethroughinmywords.OnceI2thatIwasgoingallIcouldthinkaboutwasthefunofforeigntravelandmakingallsortsofnewand3friends.Whiletravelingwasinspiringandmeetingpeoplewas4nothingaboutmyterminFrancewaswhatI5. ThemomentIarrivedinParisIwas6byaniceFrenchcouplewhowouldbecomemyhostparents.Myentireexperiencewasjoyousandexciting7Ireceivedsomeshockingnewsfrommyprogramcoordinator协调人therehadbeenadeathinmyhostparents'extendedfamily.TheyhadtotraveloutsideFranceforseveralweeks.ThatafternoonIhadto8outofonefamily'shouseintoanother.TheexchangecoordinatortoldmeI'dhavea9thistimeandaskedwhetherIcouldshareabedroomwithanEnglishspeaker.Toavoidthetemptation__to10mynativelanguageIaskednottobe11withanEnglish﹣speakingroommate.WhenIgottomynewroomI12myselftomynewroommatePaoloaBrazilian巴西人thesameageasIwhomIwassurprisedtofindplayingoneofmyfavoriteCDS!Injustafewhoursweknewwe'dbegoodfriendsfortherestofthe13. IleftFrancewithmany14sowhenpeopleaskedmewhatmyfavoritepartofthetripwastheyarealways15tohearmetalkaboutmyBrazilianfriendPaoloandscoresofweekdaysinclassweeknightsonthetownandweekends16Franceweenjoyedtogether.Ilovehowpeople17seemsodifferentbutendupbeingso18.ThemostvaluablelessonIgainedfromstudyinginFrancewasn'tjusttorespecttheFrenchpeople19torespectallpeopleforyournextbestfriendcouldbejustacontinentaway.Iwouldrecommendanexchangeprogramtoanyonewhowantstoexperienceforeignculturesandgainmeaningful20. 1A.express B.discuss C.announce D.argue 2A.approved B.knew C.warned D.denied 3A.stubborn B.anxious C.interesting D.universal 4A.boring B.upsetting C.promising D.exciting 5A.doubted B.liked C.expected D.feared 6A.greeted B.witnessed C.sponsored D.supported 7A.when B.until C.since D.while 8A.move B.travel C.walk D.rush 9A.housekeeper B.leader C.colleague D.roommate 10A.learn B.appreciate C.speak D.master 11A.combined B.fitted C.involved D.placed 12A.added B.introduced C.devoted D.adapted 13A.term B.week C.month D.vocation 14A.presents B.suitcase C.stories D.dreams 15A.disturbed B.surprised C.embarrassed D.concerned 16A.analyzing B.investigating C.describing D.exploring 17A.can B.shall C.must D.need 18A.generous B.similar C.independent D.distant 19A.but B.and C.or D.so 20A.instructions B.data C.facts D.friendships
AirportExpress WiththeAirportExpressyouareneverfarfromtown.Thereisatrainevery10minutesreadytorushyoubetweentheairportandHongKongStationintheheartoftheshoppinganddowntowndistrictinabout24minutes.OrtraveltotheAsiaWorld﹣Expoinjust1minutefromtheairport. AirportExpressservicehours Mon.﹣Fri.550amto115am Sat.﹣Sun.500amto200am Tickets TherearethreetypesofticketfortravellingtoandfromtheAirportSingleJourneyRoundTripandSameDayReturn.SingleJourneyTicketandSameDayReturnTicketarevalid有效的ondayofissue发放.RoundTripTicketisvalidfor30daysfromdayofissue.YoucanalsousetheOctopusCardfortheAirportExpress.TheOctopusCardisanelectronicstore﹣valueticketanditcanbeusedonmostpublictransport.Thefarewillbededucted扣除fromthestoredvalueeachtimesoyoudonothavetocarryheavycoins.Thecardisvalidforthreeyearsaftervaluehasbeenadded. Traveltips •Childrenunder3travelforfree. •PassengerstravellingontheAirportExpressarenowabletowriteemailanddoonlinesearcheswithWi﹣Fiservice. •FormoreinformationaboutAirportExpresspleasevisitwww.hongkongairport.comorcall00852﹣21818888. 1WhatisgoodaboutaOctopusCard? A.Itsavesmoneyforitsusers. B.Itissoldineverystore. C.Itsvalidityisunlimited. D.Itavoidsitsuserscarryingcoins. 2WhatcanyouknowaboutAirportExpress? A.HongKongStationisjust1minutedistancefromtheairport. B.SingleJourneyTicketisacceptablefor30days. C.Childrenarefreeofchargefortickets. D.PassengerscansurftheInternetontheAirportExpress. 3Whatisthemainpurposeofthepassage? A.ToprovidesuggestionsabouttheAirportExpress. B.ToadvertisetheOctopusCard. C.ToinformreadersoftheAirportExpressservice. D.TointroducetheAirportExpressschedule.
某化学反应的微观示意图如图所示下列说法正确的是
MOOCsMassiveOpenOnlineCoursesarefreebutwithouttutoringandareopentoanyoneanywhereintheworld.Thecoursesareflexible﹣normallythreetofivehoursofstudyaweek﹣doneatanytimeshort5to10weeksandvideo﹣rich.Theyarealsoheavilydependentoncrowdsourcingyoucandiscussacoursewithfellowstudentsthroughonlineforumsdiscussionboardsandpeerreview.Studentsdon'thavetofinishthecoursespassassessmentsordoassignmentsbutiftheydotheygetacertificationofparticipation. TheOpenUniversitylaunchedFutureLearntheUK'sanswertoUSplatformssuchasCourseraEdXandUdacitywhichhavebeenofferingMOOCsfromtopUSuniversitiesforthepasttwoyears.Theresponsehasbeenincrediblewithmorethanthreemillionpeopleregisteringworldwide.Meanwhilein2012EdinburghUniversitybecamethefirstnon﹣USinstitutiontojoinCoursera'spartnershipcomprising13universities.Wealreadyrun50onlinemaster'sdegreessothiswasalogicalexpansionsaysProfessorJeffHaywoodEdinburgh'svice﹣principal.It'saninvestmentinteachingmethodsresearch.HowamIgoingtoteachintroductoryphilosophyto100000people?That'swhatIcalleducationalR&D.HeaddsIfyoulookahead10yearsyou'dexpectallstudentsgraduatingtohavetakensomeonlinecoursessoyou'vegottoresearchthat.OurMOOCsarenomoreincompetitionwithourdegreesthanalifelonglearningcoursebecausetheydon'tcarrycredits. CooperationiskeyHaywoodstresses.Itisfarbettertooffer20﹣30coursesinyourownareasofexpertise专门技能andletotherinstitutionsdolikewise.ProfessorMikeSharplesFutureLearn'sacademicleadgoesfurtherWe'vetiedtheelementsavailablebeforeintoapackageofcoursesofferedbyleadinguniversitiesworldwideonanewsoftwareplatformwithanewwayofpromotingitandalsoanewsocial﹣learningteachingmethod.Youwon'tjustreceiveanexambutbeabletodiscussandmarkeachother'sassignments. BathUniversityoneofmorethan20universitiesworkingwithFutureLearnlaunchesitsfirstcourseInsideCancernextJanuaryandregardsMOOCsasawayofbreakingdownagebarriers.There'snoreasonwhysomeonedoingGCSEsshouldnotlookatourMOOCsandgetquiteawaythroughthemorsomeoneatPhDlevelandbeyondsaysProfessorBernieMorleyexpertforlearningandteaching. 1MOOCshavethesefeaturesEXCEPTthat. A.MOOCshaveaplatformforlearnerstosharetheirlearningexperience B.MOOCsprovideteachers'instructionsifyouhavesomedifficulty C.MOOCscanbeadjustedaccordingtopeople'slearningpace D.MOOCsarefreeofchargeforanyone 2TheresponsetoFutureLearnhasbeenthoughttobeunbelievablemainlybecause. A.allthecoursesontheplatformareavailabletoanyoneintheworld B.EdinburghUniversitybecamethefirstnon﹣USinstitutiontojoinit C.studentscangetacertificationofparticipationwithoutpassingassessments D.thenumberofpeopleregisteringintheplatformisbeyondexpectation 3WhatcanbeinferredfromProfessorBernieMorleyinthelastparagraph? A.PeopleatPhDlevelhavealreadyknowneverythingaboutMOOCs. B.PeoplewithvariouslearninglevelswillprobablyshowinterestinMOOCs. C.InsideCancerwillbethemostpopularcourseforsomeonedoingGCSEs. D.MOOCsarenotsocompetitiveaslifelonglearningcoursesduetotheproblemsofcredits. 4Thepassagemainlydealswith. A.theappearanceofanewlearningplatform B.thevariousopinionsonFutureLearn C.thepopularityofno﹣creditcourses D.theadvantagesofonlineteachingmethods
fyouhaveneverheardofpawpawyouarenotalone.MostAmericansdonotknowofthefruitalthoughitisnativetotheUnitedStates.OncehoweveritwasoneofthemostpopularfruitsinNorthAmerica.HappilythosewholovethepawpawaretryingtoreturnittoitsformerpositioninAmericanfoods. ThepawpawisakindoffruitthatgrowsontreesfoundallovertheeasternUnitedStates.Itissimilarinsizetoatypicalmango.Ithasadullgreen﹣coloredskinandasoftalmostcreamyorangeinside.Mostpeopleagreethatthepawpawtasteslikeacombinationofbananasapricots杏andmangos.Mostpeopleareverysurprisedbyitssweettaste.ThefruithasaveryshortharvestseasonfromtwotothreeweeksinSeptemberandOctober. Thepawpawhasneverbeensoldcommercially商品化地.Thefruitrequiresaveryspecialenvironment﹣﹣﹣lowwetareasthatsometimesflood.Inadditionthefruitisgoodtoeatforonlytwotothreedaysafterharvesting.Thismakesithardtosellanywheredistantfromthepawpawtrees. Plantersareagaingrowingpawpawtreesandharvestingthefruit.Inseveralstatesfarmershaveorganizedpawpawfestivalstoreintroducethefoodtopeople. Farmersaretryingtogrowdifferentkindsofpawpawsthatwillbeeasiertoshipandsellcommercially.DonnaandJimDavisarepawpawfarmersinWestminsterMaryland.TheytoldNationalPublicRadiothattheypurchasedtheirpawpawtreesinthe1990sandnowsellthefruitatfarmermarketsandonline. Sowhoknows?Maybethepawpawwillshowupsoonatamarketnearyou. 1Whatisthepawpaw'smostoutstandingnature? A.Itisveryrichinsugar. B.Itssourtasteislikeanapricot C.ItgrowsontreesallovertheUS. D.Itlookslikeacombinationofbananasandmangos. 2Whyisitdifficultforthepawpawtobecomeabigbusiness? A.Ithastobesoldfarfromthepawpawtree. B.Itishardtokeepitsfreshnessforlong. C.Itisdifficulttoharvestinthelowandwetareas. D.Itneedsexpensivetransportationtothemarket. 3Whatdofarmersdotodealwiththedisadvantageofpawpaws? A.TheyadvertiseonNationalPublicRadio. B.Theyorganizepawpawfestivals. C.Theyplantimprovedpawpawtrees. D.Theysellthefruitatfarmermarkets. 4Whichofthefollowingcanbethebesttitleforthetext? A.Atraditionalfruithaschangedpeople'sdiet. B.Mostpeoplehavehardlyeatenfreshpawpaws. C.FruitofpawpawplaysanimportantpartinAmerica. D.AforgottenAmericanfruitisbecomingpopularagain.
请用下列物质的序号填空 ①石墨②硝酸钾③硫酸铵④小苏打⑤烧碱 1属于复合肥料的是 2具有良好导电性可作电极材料的是 3可用于治疗胃酸过多的是．
Theboyshowsgreatcuriousaboutanimals.
硫元素在周期表中信息及原子结构示意图如下所示下列说法正确的是
热门题库
更多
高三下学期物理
高三上学期物理
高三上学期生物
高三上学期化学
高二下学期化学
高二下学期生物
高三下学期生物
高三下学期化学
高三上学期英语
高二下学期英语
教案备课库
高三下学期英语
教案备课库
教案备课库
教案备课库
教案备课库
湘公网安备 43130202000226号