属于可撤销合同的原因

长方体物块A叠放在长方体物块B上,B置于光滑水平面上.A、B质量分别为mA=6kg,mB=2kg,A、B之间动摩擦因数0.2,F=10N（拉力F作用在A上）,求A、B受到摩擦力的大小答案都是2.5N，我知道是用整体法做出 已知长20米,宽14 米,周围有一条2米道路.求大长方形的周长. 封装0805跟0603有什么区别,只存在大小的区别么 请问It’s easy to reach things.中的reach 上文是在太空中. protel封装后面的 L M 一堆产品合格率为1、一定小于100% 2、一定大于100% 3、一定等于100% 4、可能是等于100, Look at the picture,Can you find -----A.something different B.anything different I go to the science museum this morning with my friend （变成一般疑问句 选出下列括号部分错误的一项:I (went) (row) with my friends (this morning).请告诉我错在什么地方. I can't find my cat.Ineed to ___it now.look for和find用哪个? 根据解释和首字母写出单词1 t difficult 2t a path through the country 3e an activity or event that affects you in some way 6d the process of growth and making things better find out,look for,find的区别 根据首字母及解释写出单词,a_________ :tend to become severe or wider in scope i__________ :of great importancet__________ :consisting of or derived from tradition w_________ :all of something including all its partsi__________ :statements 根据英文解释和首字母写出单词e_______________give or exchange information or news卷子印的不清楚大家在想想如果是C开头的话是什么单词呢 1能够和15分之4:6分之1组成比例的最简整数比是什么?2在3:7、3分之1:7分之1和7：3这三个比中有两个比可以组成比例,组成的比例是什么?回答的好给30 求描写幽静竹林片段【要注重意境】 Sorry .I ( )at school this morning . 7S的具体内容是什么?尽量详细具体. 写出比值是2/3的两个整数比,并组成比例( ) 1.组成比例的两个比,一定是最简整数比 3题判断 - -1.组成比例的两个比,一定是最简整数比 2.两个大小不等的圆,它们的周长和半径的比可组成比例 3.4：3=8：6=12：9,这个式子是比例 对或错 急 若x是整数,并且能与2.3.4组成比例,则x的值为______所有答案 Nothing new.I saw it with my parents on the first day为什么要用I saw it 而不是 I have seen it They are -- brothers,but they look differentA.twin B.twinsCtwin's D.twins'填什么,另外请解释一下为什么,twin是名词 They are twins,but look different,对不?还是填differently? where do you parents live 和where are you parents live有区别么?有区别么?后者不对? 完成附加疑问词.you live with your parents,____? 0.4:2化成最简单的整数比是〔 ：〕,这两个比组成的比例是〔 〕 7S是指哪七项? 英语翻译0 - 离问题结束还有 14 天 20 小时 We use language primarily as a means of communication with other human beings.Each of us shares with the community in which welive a store of words and meanings as well as agreed conventions as t 专八英语改错:We use language primarily as a means of communication withWe use language primarily as a means of communication withother human beings.Each of us shares with the community in which welive a store of words and meanings as well as ag 英语四级完型：Language is a means of communicationLanguage is a means of communication, _______ it is much more than that.68. A) so C) or B) but D) for求解析 Language is a main means of c_______.这里的communication 什么时候communication加s呢?