两个共点力互相垂直

hello daming.＿＿＿Amy .what are＿＿＿?these are dogs.how may are there?there are＿＿＿.what ＿＿＿are they ＿＿＿are yellow.还有三只狗的图像. 怎么证明若A,B均为n阶实对称矩阵,且对一切x有x^TAx=x^TBx,则A=B 证明:若AB均为三阶实对称矩阵,且对一切X有XTAX=XTBX,则A=B 证明:若A,B均为3阶实对称矩阵,且对一切X有X^TAX=X^TBX,则A=B 英语翻译far from being regared as self-reliant and independent,you seem to be coming across as a threat to potential partners who can't see what they could possibly offer you.还有 it's easy to let everything slide until you aware that.woman sus don't drink too much tea in the evening ,____ you won't fall asleep 表示：能直接说 quickly 还是说hurry up?hurry up 是个词组,还是 短句?2.right now 又属于什么?短句,词组,还是什么?不太明白. Time to go with my memories.Tak...e away my soul with the advancement of science and technology是什么意思 he didn't go to the meeting because he was not ____of ita.informed b.invited c.interviewed d.reformed为什么 Everything will be better as time passing by.求翻译? 请问壳聚糖的英语文献和翻译还有吗?3000字就行,上次那个有点短 我想再接下去一篇,可以吗 例句:我不是挺立在高山峻岭中的巨松,也不是屈伸于斗室的盆景,而是辽阔草原上的一棵小草,为壮丽的山河添上一笔新绿；我不是_____________,也不是__________,而是__________,为__________. 英语翻译嫌少可以再商量,能翻译的找我,决不食言 仿句,体谅是友情中的清风一缕,微笑是交往中礼物一份,--------------------------. 求Scientific American's Sixty-sendond Science的原文和听力, Hundreds of titles of science fiction如何理解? Mary and Kathy _____ awake in their bedroom.A both are B are both C are all D all are请问用“C”可以吗 Mary and Kitty are ____awake in their bedroom.A all B ride C two 选哪个啊,能不能说出为什么,怎么翻译, Anna was reading a piece of science fiction,completely ___ to the outside world.Anna was reading a piece of science fiction,completely _D__ to the outside world.A、having been lost B、 to be lost C、losing D、 lost为什么不能选C呢,D和C的 一篇英文的bible story需要一篇英文的BIBLE STORY.两百字以内~ Mary and Kitty are()sleeping in their bedroom.kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk, I am not quite myself today travelling by train is not the fastest but the l____dangerous what did Ben want Sam to doWW I am not quiet myself I 'm not myself now 是什么意思? Anna was reading a piece of fiction ,completely( losing/lost )the outside world.答案是lost.为什么不是losing? One day George went to the library.he was reading a science这篇完形,全部 Please help me with the below sentence.English to Chinese.Thank you.I interspersed the dancing with a few spot-toning exercises and three miles on my stationary bike. Anna was reading a book,completely lost to the outside world.请问句中lost的用法和全句的翻译. would you please help me to find an fitable English name?My chinese name is Yang Yan.Sorry!My computer is now only can in the English type.