知心朋友的含义是什么?

be keen on的比较级是? i 'like to talk to you using this special way .四个选项 A on B at C by D in 如何看待道德绑架这种行为? i told you not to play soccer in the street,Jill,didn't ii told you not to play soccer in the street,Jill,didn't I 反意疑问句,不是(前否就后肯)吗,这句话前面有not,为什么后面还是用否定的didn't I told you not to play,反意疑问句 MAKE 后要加形容词原型么? He's already left for Beijing.改为否定句He_____ _____for Beijing ____.它们以什么为食?What do they ____ ____? He's already left for Beijing.改为否定句He_____ _____for Beijing ____.它们以什么为食?What do they ____ ____? By the end of last year,a new subway line to Beijing West Station____.A.would be completed B.was being completed C.has been completed D.had been completed By the end of last year,another new subway__in shanghai.A.would be completed B.was being completedC.has been completed D.had been completed Another new school ________last year in shanghai. 轻杆长为2L,两端各连一球,两球质量分别为2m和m,他们可绕通过杆中点的水平轴在竖直平面内转动,当杆转至竖直位置且重球在上、轻球在下,杆对轴作用力刚好为0.求此时杆转动的角速度怎么确 got old?中文的意思是?Will:The other thing that made Friends so good was the cast.All the actors were perfect for their characters.Jane:Oh yeah,the casting was really great.The actor who played Ross did a great job.He was hilarious!Will:Really?I 有一轻杆AO竖直放置于粗糙的水平地面上,A端用细线系住固定于地面B点.若有一水平力F,作用于AO的中点,θ=30°,杆可保持平衡,求O点与地面间的作用力的大小.θ是杆与绳子的夹角!F方向是水平向 分析火星上生命存在的可能性 到目前为止,是否存在这种可能性?也就是我们现在所存在的事情,有没有这种可能? 请问 五维世界 有存在的可能性吗 人类登上火星的可能性存在吗?大概还需要多少年?人类登上火星的可能性存在吗?大概缺乏多少年的技术?如果以后能研制出可以载人到火星的飞行器,那从地球把人带到火星需要多长时间?毕竟 红色政权存在的可能性是什么? 现在完成时有那些特点.包括用法.例句添加:现在完成时句子结构 包括归纳现在完成时的意思.越详细越好. A、B的质量关系为mA=m,mB=2m,两个物体之间用一轻弹簧相连,再用一根细线悬挂在天花板上静止,剪断细线的瞬间,两物体的加速度各是多少?（A物体被细绳相连） 什么叫满洲国,伪满洲国又是什么? 苏联为何会承认伪满洲国 满洲国的含义是什么 有助于回答者给出准确的答案我看了百科，没有看懂，溥仪是好皇帝还是坏皇帝啊。 客观存在和客观实在有什么区别,百度解释客观实在也不是很清楚貌似有点片面化了 Wifi汉译 汉译法语帮我把下面一句翻译成法语:1):您有任何疑问都可发邮件与我们联系, 汉译韩一句话谢谢,.忙的时候希望休息,哪怕一个小时也好.闲的时候又希望忙,哪怕忙一个小时也好 1.一座古塔,有登高的九层组成,一块石子从塔顶自由落下,通过最后5曾所用的时间是1秒,古大的高度.（g=10m/s2） 45m2.小石子A自塔顶自由落下2m时,小石子B自塔顶8m处自由落下,两石子同时落地,求 用英语介绍,最好有汉译 高级英语You really have to get very old before you realize you're old.You really have to get very old before you realize you’re old.I’m in my middle fifties and I don’t feel old yet.However,sometimes I look back at my childhood and 1____ th