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一理论力学题目图示机构中.AB=250mm,CD=200mm,图中尺寸单位是mm.在图示瞬时,杆AB与CD相互平行,且均在水平位置；杆ABw=2rad/s,角加速度a=6rad/s²,转向如图所示.试求该瞬时杆BC和CD的角速度, 英文歌,就是这首歌曲 麻烦英文好的人听下 这什么歌曲或者将个别歌词告诉我也可以 Do you want a friend whom you could tell everything to,like your deepest feelings and thoughts?翻译成汉语 若射线oc是角aob的平分线,则角aoc=角boc= 角aob,或角aob= 角aoc= 角boc若射线oc是角aob的平分线,则角aoc=角boc= 角aob,或角aob= 角aoc= 角boc do you want a friend whom you could tell everything to?是什么从句 Do you want a friend whom you could tell everything to like your deepest feeling and thoughts,以上那一段话的意思是什么?句中WHOM是否定语从句的引导词,Do you want a friend whom you could tell everything to like your deepest feeli do you want a friend whom you could tell everything to.为什么用whom?who可以吗 do you want a friend to whom you could tell everything有这种语法么?为什么等于do you want a friend whom you could tell everything to吗 帮我出50道数学题!有赏——积分帮我出50道初一上半学期的数学题,其中有30道计算题,计算题包括有理数加减乘除混合运算,方程,整式化简；20道几何题!别忘了把答案也写出来啊! 哪里有小学数学题目和试卷? 江苏密卷小学数学二年级上第一二单元试卷 I want to you.Want to chat with you 中文意思是什么? 我说：i thought you didn't want to chat with me 他答：I do 他的“I do, I just want to chat with you是什么 who want to chat with me 对还是who wants to chat with me 对 直角梯形ABCD中,AD平行于BC,AB垂直于BC,AD=4,AB=12,M是AB的中点,以CD为直径画圆P,判断点M于圆P的位置关系. You just want to be able to talk with me I do not want to sleep,I just want to talk with you ,but you are usually busy!I do not know how to do!I do not want to sleep,I just want to talk with you ,but you are usually busy!I do not know how to do! just want to have somebody talk with me 每个人都要通过对其他人的（ ）、（ ）、（ ）来感受自尊为了自尊,我们也需要借助（　　　　）作为镜子我们需要他们善意的提醒,以便意识到自己的（　　　　）与（　　　　　　） 这几题填什么(初一生物). 一道初一的数题.若方程组［kx+y=8 的解使整式 [ y+z=6[ z+x=4kx+2y-z的值为10,试求K的值. 在直角AOB内有一条射线OC,并且∠AOC比∠BOC大20度,则∠BOC是（ ）度. OC把∠AOB分成两部分,且∠AOC=1/3直角+1/3∠BOC,∠BOC=1/3平角-1/3∠AOC问：（1）OA与OB的位置关系怎样?（2）OC是否为∠AOB的平分线,并写出判断理由.急, 四个大小相同的小球分别标有数字1、1、2、2,把它们放在一个盒子里,从中任意摸出两个小球,它们标号分别为x,y,记M＝x＋y.求随机变量M的分布及数学期望. 求极限 lim sin pi*(n^2+1)^(1/2) she want to work quietly；with her mind made up to work as hard as she could翻译 几个中国字迷 汉字的字迷 我要几条有关汉字的字迷!越快越好 汉字字迷1.画时圆,写时方;冬时短,夏时长.( )2.千字头,木字腰,太阳出来从下照,人人都说味道好.( )3.一点一横长,你若猜出,站着想一想.( )4.有心走不快,见水装不完,长草难收拾,遇食就可餐.( ) 有9个同样大小的球,分别标有1～9这9个数字,请你选择其中的4个球放入盒子里,使以下条件成立：（在球上填上数字）1、摸出一个球，一定是双数。2、摸出一个球，可能是双数。3、摸出一个