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如图,在△ABC中,已知点D在BC边上,AD⊥AC,sin∠BAC=,AB=3,AD=,则BD的长为 .
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在△ABC中AB=AC点D.在AC边上且BD=BC=AD则∠A.=°.
已知△ABC中∠BAC=90°AB=AC点D.E.分别是BCCA边上的点且∠BAD=30°AD=AE
已知AD是△ABC中BC边上的中线若AB=2AC=4则AD的取值范围是___________.
如图在Rt△ABC中∠ACB=90°点D.是AB边上一点以BD为直径的⊙O与边AC相切于点E.连接D
已知△ABC中AB=17AC=10BC边上的高AD=8.求△ABC的面积.
已知△ABC中AB=15AC=13BC边上的高AD=12求BC.
如图△ABC中AB=AC=13BC=10AD是BC边上的中线F是AD上的动点E是AC边上的动点则CF
如图在△ABC中AB=AC点D.在AC边上且BD=BC=AD则∠
的度数为( ) A. 30°
36°
45°
70°
如图在△ABC中AD是BC边上的高tan∠B.=cos∠DAC.1求证AC=BD2若sin∠C.=B
在△ABC中已知B.=D.是BC边上一点AD=5AC=7DC=3则AB=.
如图在△ABC中已知点D.在BC边上AD⊥ACsin∠BAC=AB=3AD=3则BD的长为_____
已知如图在△ABC中AB<ACBC边上的垂直平分线DE交BC于D.点交AC于点E.AC=8cm△AB
如图点D.是△ABC中BC边上的一点且AB=AC=CDAD=BD求∠BAC的度数.
如图点D.是△ABC中BC边上的一点且AB=AC=CDAD=BD求∠BAC的度数.
如图在△ABC中AB=10AC=8BC=12AD⊥BC于D点E.F分别在AB.AC边上把△ABC沿E
14
15
16
17
如图已知△ABC中AB=17AC=10BC边上的高AD=8.则△ABC的周长为.
如图在△ABC中D.为BC边上的一点已知AB=13AD=12AC=15BD=5求CD的长.
如图在△ABC中已知点D.在BC边上AD⊥ACsin∠BAC=AB=3AD=3则BD的长为_____
问题如图①在Rt△ABC中AB=ACD.为BC边上一点不与点B.C.重合将线段AD绕点A.逆时针旋转
已知如图在△ABC中D.是BC边上的中点且AD=ACDE⊥BCDE与AB相交于点E.EC与AD相交于
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假定你是李华最近你要为你们学校的英文报写一篇关于中欧友好日暨中欧环保小使者活动走进欧盟学校的新闻报道. 内容要点 1.中国学生表演了武术书法气功等中国特色项目 2.欧洲学生上演了有关环保的戏剧节目 3.活动的意义. 注意 1.词数100左右开头已写好不计入总词数 2.可以适当添加细节以使行文连贯.参考词汇武术martialarts气功Qigong OntheChina﹣EuropeFriendshipDaymanyChinesestudentsandtheirEuropeanfriendsgottogetherataEU'smiddleschool..
Nobodylikesanoldpoop傻子.Developingasenseofhumorispartofbecomingamatureemotionallyhealthyindividual.Laughterisgoodforthesoulbuildsfriendshipsandrelievesstress.Itservesastheglueforsocialsituationsandasanice﹣breakerforsadnessandboredom.Ifyou'veeverbeentoldtolightenuporchilloutyoushouldsavetheblueattitudeforserioussituationsanddevelopyoursenseofhumor. Forgivetheaccidental.Asuddenfallishumorousnotbecauseweliketoseepeoplefallbutbecauseitsurprises.Fromaspilled溢出waterglassinameetingtoAuntRae'steethcomingoffintheThanksgivingturkeytheembarrassmentofaccidentscanberelievedbyhumorandahelpinghand.Aftermakingsurethatnobody'shurtforgiveaccidentswithachuckle咯咯地笑ratherthanascolding. Lookfortheunexpected.Thekidwhousedtolookatyouwithhiseyesclosedduringatesthadtheidea.Parentswhoservegreeneggsandhamtotheirchildrenongraduationdaygettheidea.Unexpectedactionslightenanatmosphereandrelaxpeople. Learntolaughwithyourkids.Mostofwhatchildrensayanddoisfunny.Helpthemlearnthataccidentsaresometimesfunnyandsometimesoccasionsforjoininginandhelpinganotherhumanbeing.Bysharinglaughsandattemptingtoexplainhumoryoudevelopyoursenseofhumoraswellashelpkidsdeveloptheirownsenseofhumor. 1Ifyou'veeverbeentoldtolightenuporchilloutitmeans. A.youarehumorous B.youareblue C.youlackhumor D.youarefunny 2AccordingtoParagraph2whenyourfriendfallsyoucan. A.laughathim B.chuckle C.scoldhim D.feelembarrassed 3Intheauthor'sopinionifyourmotherservesgreeneggsandhumtoyouonyourgraduationdaysheis. A.boring B.serious C.considerate D.humorous 4Whatisthebesttitleforthepassage? A.HowtoDevelopaSenseofHumor B.WaystoBecomeaHealthyIndividual C.TheFunctionofHumor D.ProperAttitudesTowardHumor
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一个点从原点出发沿x轴的正方向平移3个单位然后沿y轴的正方向平移5个单位到达点P那么点P的坐标是如果将点P沿y轴翻折所得到的点P'的坐标是.
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Asanyonewhofreelances做自由职业knowstherearelotsofadvantagesofworkingathomealone.Buttherearedrawbackstoolikethepotentialloneliness.Nowonderco﹣workingspacesarebecomingsopopulartheypermitself﹣employedindividualstofeelliketheyarepartofallofficeenvironmentwhilemakingthemgetsomeworkdonetoo.Butrentingaco﹣workingspacedoescostmoney. NowaSwedishprojectisaimingtochangethatbyturningpeople'sunder﹣usedhomesintotemporaryco﹣workingspacesavailabletofreelancersforfree.HofficewasstartedbyfreelancersChristoferGradinFranzenandJohlineZandraaboutayearagoinStockholmwhentheyinvitedafewpeopleintotheirhomeofficetoworktogether.ItwasagreatsuccessandtheprojecthassincespreadtoanumberofcitiesinEuropeNorthandSouthAmericaAustraliaIndiaandJapan.Anyonecansignupandoffertheirhomespaceasafreeco﹣workingspaceorgofindaHofficenearthem. OnaHofficedayeveryonearrivesandstartsworkatacertainhour.After45minuteseveryonegetsuptotakeabreakstretchdoqigongoryogafor10to15minutes.Afterwardspeoplecangatheraroundagainandre﹣statetheirintentionsandgoalsfortherestoftheworkdayasawaytomotivateeachother.Mealscanbeeatentogetheratacertainhourpotluck﹣style家常饭orbybringingyourownlunch. Thisprocesscreatesanencouragingandsupportiveworkenvironment.AssomefreelancersdescribeByworkingatHofficewegiveourselvesandeachotherthegifttospendourdaysinasocialworkingenvironmentwhereweareextremelyproductivewithoutignoringourotherhumanneeds.Wealsomakesuretogiveusandeachotherwhatweneedtofeelcalmhappyinspiredandcreativeduringtheworkingday. SoHofficeisnotjustaboutsharingspaceit'salsoaboutafreeexchangeofideas.AndperhapsthebestthingisthatHofficesarefreetouse. 1Hofficewasstartedto. A.changepeople'sattitudetowork B.encouragepeopletobemoresocial C.improvepeople'sworkingconditions D.provideaco﹣workingspaceforfree 2What'sthemainideaofParagraph3? A.HowpeoplerespondtoHoffice. B.HowaHofficedayworks. C.WhatpeopleshareatHoffice. D.WhatHofficemeanstopeople. 3Somefreelancers'descriptionsofHofficesuggestthatthey. A.benefitalotfromtheworkingstyle B.worklongerthanbefore C.expectmorepeopletojointhem D.can'tbeseparatedfromeachother 4WhatdoweknowaboutHofficeaccordingtothetext? A.Itisbecomingincreasinglypopular. B.Ithasbeenaroundforquiteafewyears. C.Ithascreatedmanynewjobopportunities. D.Itissuitableforpeoplefromallwalksoflife.
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