关于度假的对话A=Bob,B=Cindy八上
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设三角形ABC,AD为BC边上的角平分线,内心为I.|BC|=a,|AC|=b,|AB|=caIA+bIB+cIC=aIA+b(AB+IA)+c(AC+IA)=(a+b+c)IA+b(DB-DA)+c
去可可英语网站上看看.我们大学老师推荐的.很不错,虽然广告有些多.试试,朋友.
PA=OA-OP=(1-a)OA-bOBPB=OB-OP=(1-b)OB-aOA三点A,B,P共线PA=nPB(1-a)OA-bOB=n[(1-b)OB-aOA]-b/(1-b)=(1-a)/(-a)
Amorningsir,doyouneedanyhelp?Byes,Iamfindingthewaitingroom10.Adon'tworrysir,Icanhelpyou,couldyoutell
A:I‘mfine,too.有不明白的地方再问哟,祝你学习进步,更上一层楼!(*^__^*)再问:A:metoo.bytheway._________B:ihelpeddosomethinginthe
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eat,what,a,whatabouteat,,them,too,she,like,know再答:谢谢
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HellospeaklikeonSee
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1)Itisunderthetable.2)No.itisn't.3)wherearemycushion?4)Itisonthetable.5)Wherearemybooks
havewhatsome,andthattooeatshelikesknow
A:Hello,bob!【WhereareyougoingB:hellosteve.i"mgoingtoschool.A;istheschoolnearyourhome?B:yesitisA:doyo
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补全对话A:1.(Whatdoyoulive?)B:IliveinthecenterofthecityA:2.(Isitfaraway?)B:Ithinkitis,butmyparentssayiti
刚没事给你编了个A:Hi!BIt'snicetoseeyou!Howisyouholiday?B:Well,It'sgreatIhadbeentoTibet.It'sunbelivablebeauti