1、质量为半径为的均质圆柱体放在粗糙水平面上。柱的外面绕有轻绳，绳子跨过一个很轻的滑轮，并悬挂一质量

塞翁失马这则寓言通过_____、________、________（用四字短语概括）什么三件事形象地表达了“祸兮福所倚,福兮祸所伏”的道理? neither 用法他们都没去,怎么翻?neither of them went.还是 neither of them did go.为什么?google里面,neither of them did go 翻译的是他们都没去.可是好像不对劲,neither either 用法是什么? 新疆有哪些地方适合人居住? 全球最适合人居住的是哪些地方? 求hot summer手机铃声,从hot summer oh hot summer 开始~ This is his pencil sharpener 改为一般疑问句和否定句怎么改? 谁帮我翻译成英文：客户维护? 英语翻译下面一句话 主要的工作职责是开发和维护客户 臭豆腐为什么闻起来臭吃起来香 为什么臭豆腐闻起来臭,吃起来香? 为什么臭豆腐闻起来很臭 吃起来很香! To his surprise,the man found shark fins---from banquet menu in this restaurant.A .having been removed B,removed C,to be removed D .being removed 为啥不选A [-C6] He said he had gone home ______ .A.two days agoB.two days beforeC.the day before yesterdayD.last week翻译包括选项并分析 We are going on a ___(pcniic)with a group of freds 怎么写? I'm going on a picnic with a group of _f____. i am goingo a picnic with a group of ff 后面填什么 can have gone和may have gone的区别这2个都表示对过去的事情表示猜测,请问用法有什么区别呢?例如,there is no light in the room,can they have gone out?there is no light in the room,may they have gone out?这两句话的用法 对Perhaps 和表示可能后的答案是He might have gone home early.为什么might后面用原题为Perhaps he went home early 回答为He might have gone home early 问题为在原题中用might表可能时,为什么might后用现在完成时 —Have you seen Mr.Brown?—Oh,he has gone home____Christmas.A.on B.at C.for D.toWhy? “Are they going() a picnic () a sunny morning?”两个空填什么?为什么?有选项的A.on,in B.on,on C.in,in D.in,on 汉语拼音re怎么读 She have an apple （修改病句的） 什么是名词、状语? 名词坐状语时什么意思 英语翻译如果有固定短语 英语i used to be afraid of the dark 要讲i used to be afraid of the dark 这一单元的课程,这个单元呢就是讲的是我过去常常做某事,就讲了一个重点句型,然后呢就是练习这个句型的否定句啊,什么疑问句啊 that is orange orange和these are yellow flowers的同义句 I am going on a picnic with a group of ( ) These bags are those --------.(run) Helen is in the computer room.划线部分提问.—————————— 方志敏的名言有哪些? I used to be afraid of the dark.