什么是二力平衡定理

summer camp可数吗如果可数,为什么是go to summer camp而不是go to a summer camp呢? 好的体育课是怎么样的,需要制定哪些方面的基本标准? 体育课优良中差标准是什么? 一道自考专升本选择题I would like to go to the party,but ___.A.I am not invitedB.I have not been invitedC.I was not invitedD.I will not be invited选哪个?为什么?其他的选项为什么不可以? 自考英语选择题1Statistics show that the normal life _____ in China is now 72.A.prediction B.prospect C.span D.forecast 求个清丽简洁的英文名 我的名字里有个君字 in 名人对贾宝玉的评价短短一两句话那种 要有名人的姓名 多给我几句 喜盈门 IN LAWS怎么样 简要评价贾宝玉 that is the time ___he arrives.A when B that CD AorBorC.（为什么选D isliuxiang smother sbirthday in may什么意思 hope for,hope that,还有那些用法I hope _ (invite) to the party. Translate什么意思 translate 请教一个英文句子的语法问题All you need to do to use the drive is connect it all you need to do is askall you need to do is just be yourself.我的问题是：is 后面为什么接动词原形啊.不是要接ing 英语翻译Let me be the one who calls you baby all the timeSurely you can take some comfort knowing that you're mineJust hold me tight,lay by my sideand let me be the one who calls you baby all the timeI found my place in the worldCould stare at yo smother的中文 Gain Ahead Group Limited 是什么样得体团 rather than不是介词词组吗?为什么prefer to do rather than do中rather than后面加do?介词后面不是应该加doing吗? 与rather than 有关的所有词组. 加上prefer、would 什么的 好像有很多 但老是记混了 加to do 还是do的 renew the commitment是什么意思只是一个动词短语吧。重申的承诺是名词好吧。是不是有续约的意思啊 translate是什么意思 Dream;Always insufficiently is long may we need to vainly hope for. 上教出版社七年级上练习册答案、 设想 的反义词是什么? 幻想的反义词, 有什么成语是带拼音"shi"的.或者谐音也行.只要有"shi"就行.成语意思要好点的. 明清时期的太监是怎样小便的,站着还是蹲着? pick和cake中 c的读音相同吗?还有 black和calculator的a的读音noise和point的oi的读音! he was at peace listening to the birds singing early in the morning the birds w up early every morning 中间那个单词怎么填