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如图,AC与BD交于点O,AB∥CD,∠AOB=105°,∠B=30°,则∠C的度数为( )
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如图ABCD相交于点O.AO=BOAC∥DB.求证AC=BD.
如图所示⊙O与AC相切于点A且AB=ACBC与⊙O相交于点D下列说法不正确的是
∠C=45°
CD=BD
∠DAB=∠DAC
CD=AB
如图在□ABCD中对角线ACBD相交于点O..如果AC=14BD=8AB=x那么x的取值范围是___
如图所示ABCD的对角线AC和BD交于点O.若AC=6BD=10AB=4则△AOB的周长等于__
在矩形ABCD中对角线ACBD相交于点O.若∠AOB=60°AC=10则AB=.
如图在▱ABCD中已知对角线AC和BD相交于点O.△AOB的周长为10AB=4那么对角线AC+BD=
如图已知AB=CDAB∥CDACBD交于点O.EF过点O.交AB于E.交CD于F.则图中全等三角形共
两块等腰直角三角形纸片AOB和COD按图1所示放置直角顶点重合在点O.处AB=25CD=17.保持纸
如图四边形ABCD中AB=CD∠BAD+∠ADC=180°AC与BD相交于点O.△AOB是等边三角形
已知如图AC和BD相交于点O.说明AC+BD>AB+CD8分
在△AOB中C.D.分别是OAOB边上的点将△OCD绕点O.顺时针旋转到△OC′D.′.1如图1若∠
如图已知AB∥CDAD和BC相交于点O.∠
=50°,∠AOB=105°,则∠C.等于( ) A.20°
25°
35°
45°
已知如图AC和BD相交于点O.说明AC+BD>AB+CD8分
如图在矩形ABCD中对角线ACBD相交于点O..若∠AOB=60°AB=4cm则AC=______c
如图□ABCD的对角线ACBD相交于点O.EF过点O.且与ABCD分别相交于点E.F.求证△AOE≌
如图8在矩形ABCD中对角线ACBD相交于点O.若∠AOB=60°AB=4cm则AC的长为__cm.
已知如图AC和BD相交于点OOA=OCOB=OD求证AB∥CD.
已知如图点D.在AB上点E.在AC上BE和CD相交于点O.AB=AC∠B.=∠C.求证BD=CE.v
如图AC和BD相交于点O.OA=OCOB=OD求证AB∥CD
如图AB是⊙O.的一条直径过A.作⊙O.的切线在切线上取一点C.使AC=AB连接OC与⊙O.交于点D
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Fouryearsagoweaskedourselveswhatifwecouldcreateashoppingexperiencewithnowaitinginlinesandnocheckout?Orcouldwecreateaphysicalstorewherecustomerscouldsimplytakewhattheywantandgo?OuranswertothosequestionsisAmazonGowhereyoucouldexperiencetheideaofjustwalkoutshopping. AmazonGoisanewkindofstorewithnocheckoutrequired.Wecreatedtheworld′smostadvancedshoppingtechnologysoyouneverhavetowaitinline.WithourjustwalkoutshoppingexperiencesimplyusetheAmazonGoapptoenterthestoretaketheproductsyouwantandgo!Nolinesnocheckout. Ourcheckout﹣freeshoppingexperienceismadepossiblebythesametypesoftechnologiesusedinself﹣drivingcarscomputervisionsensorfusionanddeeplearning.Ourjustwalkouttechnologyautomaticallydetectswhenproductsaretakenfromorreturnedtotheshelvesandkeepstrackoftheminyourvirtualcart.Whenyou9redoneshoppingyoucanjustleavethestore.Shortlyafterwe′llchargeyourAmazonaccountandsendyouareceipt. Weofferdeliciousready﹣to﹣eatbreakfastlunchdinnerandsnackoptionsmadefresheverydaybyouron﹣sitechefsandfavoritelocalkitchensandbakeries.Ourselectionoffoodstuffrangesfrombreadandmilktocheesesandlocallymadechocolates.Yoifllfindwell﹣knownbrandsweloveplusspecialfindswe′reexcitedtointroducetocustomers.Foraquickhome﹣cookeddinnerpickuponeofourchef﹣designedAmazonMealKitsandyoucanmakeamealfortwoinabout30minutes. Our1800﹣square﹣footshoppingspaceisconvenientlycompact紧凑的sobusycustomerscangetinandoutfast.Itislocatedat21317thAveSeattleWAonthecornerof7thAvenueandBlanchardStreet.AllyouneedisanAmazonaccountasupportedsmartphoneandthefreeAmazonGoapp. AmazonGoiscurrentlyonlyopentoAmazonemployeesinourtestingprogramandwillbeopentothepublicsoon. 1FromthepassagewecanlearnthatAmazonGo. A.isacheckout﹣freestore B.sellsallkindsofgoods C.isopentothepublic D.usesunknowntechnologies 2WhatismainlydiscussedinParagraph3? A.WhenAmazonGocharges. B.HowAmazonGoworks. C.WhereAmazonGolies. D.WhatAmazonGosells. 3CustomerspayfortheproductsfromAmazonGoby. A.payingcashatthecounter B.walkingoutofthestore C.usingtheirAmazonaccounts D.scanningsmartphoneswhenleaving 4Themainpurposeofthepassageisto. A.encouragepeopletoshoponline B.advisepeopletoworkforAmazon C.informpeopleofanewconceptstore D.tellpeopleoftheshoppingexperience
Itwas难以置信的thatsuchanhonestfellowshouldhavebetrayedhisfriends.
如图矩形ABCD中AB=2AD以A为圆心AB长为半径作弧BECD于E若AB=4则阴影部分的面积为结果保留π和根号.
AB两地之间有一C地某日早上9点一辆电力巡查车作例行巡查查线路是从A地到C地再原路返回A地全程匀速行驶调头时间忽略不计.家住C地的陈先生同样是在当天的早上9点出发驱车前往B地取一份文件然后返回经C地前往公司所在地A地.陈先生余程也是匀速行驶取文件花费了4分钟设两车之间的距离为ym出发后的行驶时间为xminy与x的关系如图所示.那么当电力巡查车到达C地时陈先生距A地还有m.
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.错误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. DisappointingattheresultoftheexaminationIsatonthesofainsilentafterschool.MyfatherhefoundIwassounhappycometoaskmewhy.Afterlearningthereasonmyfathergavemeasmile.HesaidDon'tallowtheterriblythingsinyourlifetodiscountthepositiveones.Don'tletabaddayormonthoryeartomakeyoufeellikeyouhaveabadlifeinsteadfocusingoneverythingthat'sgoingwrongstartholdingontoallofthethingsthatisgoingright.You'llfeelbettersoon.HeardwhatmyfathersaidIfeltittheshametoactlikethatanddecidedtocheermyselfup.
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