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圆上恰有两点到直接的距离为1,则圆心到直线的距离为什么必须在（1,3）内?想了好久都没明白,麻烦高手解释的尽量详细些.忘记说了，半径为2 已知弦长1700和圆的半径900,如何算圆心到弦的直线距离 一个点到三个顶点的距离相等,那么这三个点是否在以这个点为圆心的圆上 初一作文Dear wangmei 60词左右.英语作文初一30的下册 在平行四边形ABCD中,若丨向量AB+向量AD丨=丨向量AB-向量AD丨,则必有A向量AD=向量0 B ABCD是正方形 C ABCD是矩形 D 向量AB=向量0或向量AD=向量0 圆与直线距离的问题如题 若直线X-Y=2与圆（X-a)+Y=4的距离为√2,则实数a的值为.. 英语单项 几道英语单项 英语几个单项 谁能帮我做点英语单项 英语单项一道How can I help _____ if people don't read the instructions?A、that B、it C、what D、themD错我,答案及语法原因? 英语单项1-5 一道英语单项1.______ of them felt very tired but quiet happy after _______ sports meeting.A.Everyone; a two days B.Every one; the two daysC.Every one; the two-day D.Everyone; the two days' 一道英语单项!—I’m sorry!I would have taken him to hospital if I had known he was seriously ill.—But_____.[ ]A.you didn't B.you hadn't C.he wasn't D.you aren't 指数函数 第八题 求写妈妈的歌词 一道英语单项,Children hate to take medicine and I used to find her strange that she ______ taking all that medicine.Aenjoys Benjoyed.Cshould enjoy.Dhad enjoy e d 再来一道英语单项____breaks the law deserves a fine,A.WhoB.Howerver heC.WhoeverD.No matter who我选了D老师曾经说D引导的是让步状语从句那么这道题是什么从句? 在某人的记忆中英语在那么说 什么产生万有引力?为什么地球会产生引力?万有引力来自哪里,怎样相互作用? 一个两位数,在它的中间写上0,所成的三位数比原来两位数多630,并且是原来两位数的9倍多6原两位数是多少 英语单项题what ＿＿your brother going to do?A.am B.is C.are好像BC都行! 英语单项第14题 1.After the earthquake,the people in the city were in _____troubie.----In fact,____suffering of the people was extreme.A,a；a B,不填；不填 Cthe；the D不填；the2.Ellen is always working for others.She is hoping she'll_______her own business 英语单项习题求解答before the examination he had the lights__the whole nighta,burned b,to burn c,burning d,burn为什么选c啊?为什么不选a啊?had something done不对吗? 如图,oa⊥oc,ob⊥od,∠boc＝30°,求aob,cod,aoc 帮我拼成一个英文词谁能帮我把“K、T、B、T、Y、J、H”或是“L、T、Q、Z、C、L、H”拼成一个英文词.= =||| 他们想组个队的名字。也不能变成名字么？其他语言呢？我也觉得无聊~搞那么洋忽~ 请将下列字母拼成英文字例子:字母 lofw 可拼成 wolf.(第1-5题每题5分) 1 .enab2 .apels 3 .rchhuc 4 .ednrga 5 .namout (第6-10题每题10分) 6 .tnaaimni 7 .ntiineont 8 .cegteatir 9 .nredeeffic 10.rfakabtse(第11题20分)11.nntrdetio Wo~Loving sb. love from sb love sb 和 in love with sb的区别?具体情况是这样的.来自电影台词A:You love her.B:Yes,of course.A:Daniel,Are you in love with her?B:Let's talk about something else okay?所以,这其中细微的区别是神马?是爱和相爱么?但是 I LOVE sb and sb对吗