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Crohn病多位于
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Crohn病多位于
回肠末端及结肠起始部
直肠,乙状结肠
结肠肝曲
横结肠
全结肠
关于肝细胞棘球蚴病正确的是
X线片具有重要价值
容易引起肝硬化
多位于肝左叶
不易出现黄疸
多位于肝右叶
Crohn病的病变大多位于
空肠
末段回肠
回盲部
全结肠
直肠、乙状结肠
Crohn病的病变大多位于
回肓部
末端回肠和邻近结肠
直肠、乙状结肠
全结肠
十二指肠
Crohn病多位于______
结肠肝曲
回肠末端及结肠起始部
横结肠
盲肠乙状结肠
全结肠
Crohn病的病变大多位于
空肠
末段回肠
回盲部
全结肠
直肠、乙状结肠
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Monkeysseemtohaveawaywithnumbers. AteamofresearcherstrainedthreeRhesusmonkeystoassociate26clearlydifferentsymbolsconsistingofnumbersandselectiveletterswith0﹣25dropsofwaterorjuiceasareward.Theresearchersthentestedhowthemonkeyscombined﹣oradded﹣thesymbolstogetthereward. Here'showHarvardMedicalSchoolscientistMargaretLivingstonewholedtheteamdescribedtheexperimentIntheircagesthemonkeyswereprovidedwithtouchscreens.Ononepartofthescreenasymbolwouldappearandontheothersidetwosymbolsinsideacirclewereshown.Forexamplethenumber7wouldflashononesideofthescreenandtheotherendwouldhave9and8.Ifthemonkeystouchedtheleftsideofthescreentheywouldberewardedwithsevendropsofwaterorjuiceiftheywentforthecircletheywouldberewardedwiththesumofthenumbers﹣17inthisexample. Afterrunninghundredsofteststheresearchersnotedthatthemonkeyswouldgoforthehighervaluesmorethanhalfthetimeindicatingthattheywereperformingacalculationnotjustmemorizingthevalueofeachcombination. Whentheteamexaminedtheresultsoftheexperimentmorecloselytheynoticedthatthemonkeystendedtounderestimate低估asumcomparedwithasinglesymbolwhenthetwowerecloseinvalue﹣sometimeschoosingforexamplea13overthesumof8and6.TheunderestimationwassystematicWhenaddingtwonumbersthemonkeysalwayspaidattentiontothelargerofthetwoandthenaddedonlyafraction小部分ofthesmallernumbertoit. ThisindicatesthatthereisacertainwayquantityisrepresentedintheirbrainsDr.Livingstonesays.Butinthisexperimentwhatthey'redoingispayingmoreattentiontothebignumberthanthelittleone. 1Whatdidtheresearchersdotothemonkeysbeforetestingthem? A.Theyfedthem. B.Theynamedthem. C.Theytrainedthem. D.Theymeasuredthem. 2Howdidthemonkeysgettheirrewardintheexperiment? A.Bydrawingacircle. B.Bytouchingascreen. C.Bywatchingvideos. D.Bymixingtwodrinks. 3WhatdidLivingstone'steamfindaboutthemonkeys? A.Theycouldperformbasicaddition. B.Theycouldunderstandsimplewords. C.Theycouldmemorizenumberseasily. D.Theycouldholdtheirattentionforlong. 4Inwhichsectionofanewspapermaythistextappear? A.Entertainment. B.Health. C.Education. D.Science.
ThesmalltownofRjukaninNorwayissituatedbetweenseveralmountainsanddoesnotgetdirectsunlightfromlateSeptembertomid﹣March﹣1sixmonthsoutoftheyear. Ofcoursewe2itwhenthesunisshiningsaysKarinRowhoworksforthetown'stourismoffice.Weseetheskyis3butdowninthevalleyit'sdarker﹣it'slikeona4day. Butthat5whenasystemofhigh﹣tech6wasintroducedtoreflectsunlightfromneighboringpeaks山峰intothevalleybelow.Wednesdayresidents居民ofRjukan7theirveryfirstrayofwintersunshineArowofreflectiveboardsonanearbymountainsidewereputto8.Themirrorsarecontrolledbyacomputerthat9themtoturnalongwiththesunthroughoutthe10andtocloseduringwindyweather.Theyreflectaconcentratedbeam束oflightontothetown'scentral11creatinganareaofsunlightroughly600squaremeters.Whenthelight12Rjukanresidentsgatheredtogether. Peoplehavebeen13thereandstandingthereandtaking14ofeachotherRosays.Thetownsquarewastotally15.Ithinkalmostallthepeopleinthetownwerethere.The3500residentscannotall16thesunshineatthesametime.17thenewlightfeelslikemorethanenoughforthetown's18residents. It'snotvery19shesaysbutitisenoughwhenweare20. 1A.only B.obviously C.nearly D.precisely 2A.fear B.believe C.hear D.notice 3A.empty B.blue C.high D.wide 4A.cloudy B.normal C.different D.warm 5A.helped B.changed C.happened D.mattered 6A.computers B.telescopes C.mirrors D.cameras 7A.remembered B.forecasted C.received D.imagined 8A.repair B.risk C.rest D.use 9A.forbids B.directs C.predicts D.follows 10A.day B.night C.month D.year 11A.library B.hall C.square D.street 12A.appeared B.returned C.faded D.stopped 13A.driving B.hiding C.camping D.sitting 14A.pictures B.notes C.care D.hold 15A.new B.full C.flat D.silent 16A.block B.avoid C.enjoy D.store 17A.Instead B.However C.Gradually D.Similarly 18A.nature﹣loving B.energy﹣saving C.weather﹣beaten D.sun﹣starved 19A.big B.clear C.cold D.easy 20A.trying B.waiting C.watching D.sharing
如图三棱柱ABC﹣A1B1C1中侧棱垂直底面∠ACB＝90°AC＝BC＝AA1D是棱AA1的中点． Ⅰ证明平面BDC1⊥平面BDC Ⅱ平面BDC1分此棱柱为两部分求这两部分体积的比．
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. I'vehadmanydreamssinceIwasachild.Nowmydreamistoopensacafe.Thoughitmayappearsimpleitrequiredalotofideasandefforts.WhatIwantisnotjustanordinarilycafebutaveryspecialone.IwantmycafehaveaspecialthemesuchaslikeTangDynasty.Inthecafecustomerswillenjoyyourselvesinthehistoricalenvironmentwhatiscreatedforthem.IfIsucceedinmanageoneIwillopenmore.Iwishtohaveachainofcafesinmanydifferentcity.Eachofmycafeswillhaveadifferentthemeandanuniquestyle.
将函数fx＝sin2x+的图象向右平移个单位长度得到gx图象则下列判断错误的是
已知y2＝4x的准线交x轴于点Q焦点为F过Q且斜率大于0的直线交y2＝4x于AB∠AFB＝60°则|AB|＝．
已知正项等比数列{an}满足a3＝1a5与的等差中项为则a1的值为
MarianBechtelsitsatWestPalmBeach'sBarLouiecounterbyherselfquietlyreadinghere﹣bookasshewaitsforhersalad.Whatisshereading?Noneofyourbusiness!LunchisBechtel'smetime.AndlikemoreAmericansshe'snotalone. Anewreportfound46percentofmealsareeatenaloneinAmerica.Morethanhalf53percenthavebreakfastaloneandnearlyhalf46percenthavelunchbythemselves.Onlyatdinnertimeareweeatingtogetheranymore74percentaccordingtostatisticsfromthereport. Iprefertogooutandbeout.Alonebuttogetheryouknow?Bechtelsaidlookingupfromherbook.BechtelwhoworksindowntownWestPalmBeachhaslunchwithcoworkerssometimesbutlikemanyofustoooftenworksthroughlunchatherdesk.Alunchtimeescapeallowshertokeepabossfromtappingherontheshoulder.Sheretunstoworkfeelingenergized.TodayIjustwantedsometimetomyselfshesaid. JusttwoseatsoverAndrewMazolenyalocalvideographerisfinishinghislunchatthebar.Helikesthathecansitandcheckhisphoneinpeaceorchatupthebarkeeperwithwhomhe'sonafirst﹣namebasisifhewantstohavealittleinteraction交流.Ireflectonhowmyday'sgoneandthinkabouttherestoftheweekhesaidIt'sachanceforself﹣reflection.Youreturntoworkrechargedandwithaplan. Thatfreedomtochooseisonereasonmorepeopleliketoeatalone.Therewasatimewhenpeoplemayhavefeltawkwardaboutaskingforatableforonebutthosedaysareover.Nowwehaveoursmartphonestokeepuscompanyatthetable.Itdoesn'tfeelasaloneasitmayhavebeforealltheadvancesintechnologysaidLaurieDemerittwhosecompanyprovidedthestatisticsforthereport. 1Whatarethestatisticsinparagraph2about? A.Foodvariety. B.Eatinghabits. C.Tablemanners. D.Restaurantservice. 2WhydoesBechtelprefertogooutforlunch? A.Tomeetwithhercoworkers. B.Tocatchupwithherwork. C.Tohavesometimeonherown. D.Tocollectdataforherreport. 3WhatdoweknowaboutMazoleny? A.Hemakesvideosforthebar. B.He'sfondofthefoodatthebar. C.Heinterviewscustomersatthebar. D.He'sfamiliarwiththebarkeeper. 4Whatisthetextmainlyabout? A.Thetrendofhavingmealsalone. B.Theimportanceofself﹣reflection. C.Thestressfromworkingovertime. D.Theadvantageofwirelesstechnology.
ForWesterndesignersChinaanditsrichculturehavelongbeenaninspirationforWesterncreative. It'snosecretthatChinahasalwaysbeenasource来源ofinspirationfordesignerssaysAmandaHillchiefcreativeofficeratA+ENetworksaglobalmediacompanyandhometosomeofthebiggestfashion时尚shows. EarlierthisyeartheChinaThroughALookingGlassexhibitioninNewYorkexhibited140piecesofChina﹣inspiredfashionableclothingalongsideChineseworksofartwiththeaimofexploringtheinfluenceofChineseaesthetics美学onWesternfashionandhowChinahasfueledthefashionableimaginationforcenturies.TheexhibitionhadrecordattendanceshowingthatthereishugeinterestinChineseinfluences. ChinaisimpossibletooverlooksaysHill.ChinesemodelsarethefacesofbeautyandfashioncampaignsthatselldreamstowomenallovertheworldwhichmeansChinesewomenarenotjustconsumersoffashion﹣theyarecentraltoitsmovement.Ofcoursenotonlyaretoday'stopWesterndesignersbeinginfluencedbyChina﹣someofthebestdesignersofcontemporaryfashionarethemselvesChinese.VeraWangAlexanderWangJasonWuaretakingonGallianoAlbazMarcJacobs﹣andbeatingthemhandsdownindesignandsalesaddsHill. ForHillitisimpossiblenottotalkaboutChinaastheleadingplayerwhendiscussingfashion.ThemostfamousdesignersareChinesesoarethemodelsandsoaretheconsumersshesays.Chinaisnolongerjustanothermarketinmanysensesithasbecomethemarket.IfyoutalkaboutfashiontodayyouaretalkingaboutChina﹣itsinfluencesitsdirectionitsbreathtakingclothesandhowyoungdesignersandmodelsarefinallyacknowledgingthatinmanyways. 1WhatcanwelearnabouttheexhibitioninNewYork? A.Itpromotedthesalesofartworks. B.Itattractedalargenumberofvisitors. C.ItshowedancientChineseclothes. D.ItaimedtointroduceChinesemodels. 2WhatdoesHillsayaboutChinesewomen? A.Theyaresettingthefashion. B.Theystartmanyfashioncampaigns. C.Theyadmiresupermodels. D.Theydobusinessallovertheworld. 3Whatdotheunderlinedwordstakingoninparagraph4mean? A.learningfrom B.lookingdownon C.workingwith D.competingagainst 4Whatcanbeasuitabletitleforthetext? A.YoungModelsSellingDreamstotheWorld B.AChineseArtExhibitionHeldinNewYork C.DifferencesBetweenEasternandWesternAesthetics D.ChineseCultureFuelingInternationalFashionTrends
若xy满足约束条件的最小值为．
A90﹣year﹣oldhasbeenawardedWomanOfTheYearfor1beBritain'soldestfull﹣timeemployee﹣stillworking40hoursaweek.NowIreneAstburyworksfrom9amto5pmdailyatthepetshopinMacclesfield2sheopenedwithherlatehusbandLes.Heryearsofhardworkhave3finalbeenacknowledgedafteracustomernominated提名hertobeCheshire'sWomanOfTheYear. PickingupherLifetimeAchievementawardproudIrene4declareshehadnoplans5retirefromher36﹣year﹣oldbusiness.IrenesaidIdon'tseeanyreasontogiveupwork.IlovecominghereandseeingmyfamilyandallthefriendsI6makeovertheyears.IworknotbecauseIhaveto7becauseIwantto. GranddaughterGayleParks31﹣whoworksalongsideherinthefamilybusiness﹣saiditremainedunknownastowhonominatedIrenefortheaward.ShesaidWedon'thaveanyideawhoputgrandmaforward.Whenwegotacall8sayshewasshort﹣listedwethoughtitwas9joke.Butthenwegotanofficialletterandwewereblownaway.Wearesoproudofher.It's10wonder.
设函数fx＝ax2+ba≠0若则x0＝．
已知函数fx＝gx＝﹣4x+a•2x+1+a2+a﹣1a∈R若fgx＞e对x∈R恒成立e是自然对数的底数则a的取值范围是
已知函数fx＝|2x﹣1|+|x+1|． 1解不等式fx≥3 2记函数fx的最小值为m若abc均为正实数且求a2+b2+c2的最小值．
在△ABC中角ABC的对边分别是abc．已知． Ⅰ求角C的值 Ⅱ若求△ABC的面积．
已知函数fx＝sinx+cosx把函数fx的图象向右平移个单位再把图象的横坐标缩小到原来的一半得到函数gx的图象当x∈[0]时方程gx﹣k＝0有两个不同的实根则实数k的取值范围为
已知集合A＝{x|﹣3＜x＜6}B＝{x|2＜x＜7}则A∩∁RB＝
已知函数fx＝﹣bxab∈R． 1当b＝0时讨论函数fx的单调性 2若函数gx＝在x＝e为自然对数的底时取得极值且函数gx在0e上有两个零点求实数b的取值范围．
已知为单位向量当的夹角为时在上的投影为
某程序框图如图所示若该程序运行后输出的值是则a的可能值为
设数列{an}满足a1+2a2＝3且对任意的n∈N*点Pnnan都有则{an}的前n项和Sn为
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已知双曲线C﹣＝1a＞0b＞0的左焦点为F若点F关于双曲线的渐近线的对称点在双曲线的右支上则该双曲线的离心率是
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假定你是校排球队队长李华.请写封邮件告知你的队友Chris球队近期将参加比赛内容包括 1.比赛信息 2.赛前准备 3.表达期待. 注意 1.词数100左右 2.可以适当增加细节以使行文连贯.
设集合M＝{x|log2x﹣1＜0}集合N＝{x|x≥﹣2}则N∩M＝
某单位从一所学校招收某类特殊人才．对20位已经选拔入围的学生进行运动协调能力和逻辑思维能力的测试其测试结果如下表 例如表中运动协调能力良好且逻辑思维能力一般的学生有2人．由于部分数据丢失只知道从这20位参加测试的学生中随机抽取一位抽到运动协调能力或逻辑思维能力优秀的学生的概率为． Ⅰ求ab的值 Ⅱ从参加测试的20位学生中任意抽取2位求其中至少有一位运动协调能力或逻辑思维能力优秀的学生的概率 Ⅲ从参加测试的20位学生中任意抽取2位设运动协调能力或逻辑思维能力优秀的学生人数为ξ求随机变量ξ的分布列及其数学期望Eξ．
公元263年左右我国数学家刘徽发现当圆内接多边形的边数无限增加时多边形面积可无限逼近圆的面积由此创立了割圆术利用割圆术刘徽得到了圆周率精确到小数点后面两位的近似值3.14这就是著名的徽率．如图是利用刘徽的割圆术设计的程序框图则输出的n值为 参考数据sin15°≈0.2588sin7.5°≈0.1305．
如图所示某几何体由底面半径和高均为5的圆柱与半径为5的半球面对接而成该封闭几何体内部放入一个小圆柱体且圆柱体的上下底面均与外层圆柱的底面平行则小圆柱体积的最大值为
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