中国是不是快乱套了

有一水平向右的力F2,F1与它成夹角a斜向上那麼F2与它们的合力的夹角b 等於?tanb=(F1sina)/(F1cosa+F2)这条式子对吗?因为我推出公式后和我抄的笔记有些少分别我抄的是tanb=(F2sina)/(F1+F2cosa)我怕我抄 高中物理,求解析,如图,有关合力计算的 _____can always try to do a little better than__best.A.One one's B.one his one相应的物主代词是one's 或his .那这种情况如何解释. 急需a bed of roses的意思! 英语翻译是歌词的翻译 英语翻译 We have thought it sad ---Be careful!there is a doglying on the ground 这句话中为什么冠词要用a,而Do　you　know　the　girl who　is standing under the tree?为什么这句话的冠词要用the呀?这两句话不是差不多意思吗?一个是说有一条狗 Is It a car? There was ice and snow covering in the street,but it did not slow Lisa down.翻译成汉语 用“as”连接下列语句：1 There was too much snow on the street.I got to shool later than befor.2 You had better stay at home.It is snowing outside. There are many ______on the street填空.A.to B.too C.two 在图所示的电路中,电源电压不变．当电建S由断开到闭合时,电压表V2的示数将_____电压表V1示数与电流表A示数的比值将________ under the snow there are many rocks.再此为什么说many rocks为什么是介宾?什么是介词? 天涯之地.海地平面.唯独此物最早的动物.猜十二生肖,解释一下,谢谢. 走遍天涯无敌手是指十二生肖的什么动物 bed什么意思? 需要Boulevard Of Broken Dreams 的歌词,没打出来你还告诉我做什么,掉胃口啊 lt … sunny today,but it…(rain)heavily yesterday 有没有to the light house的中文赏析啊? we are walking on the same road as marco A pair of pants （ ）on the bed.括号内填什么? Excuse me,do you have your( )(邻居）telephone number?空格里添啥?为啥么?@ ___ did he tell me his telephone number?I have no ideaA.For what purpose B.On what purpose C.For the purpose of D.On purpose选B可以吗? For what purpose did he tell me his telephone number..为什么用did he 这样的疑问语序 May I stand 什么 to you? this may be hot or cold,and you stand under it when you are dirty 的中文以及谜底 The worst way to miss someone is to be sitting right beside him knowing you can"t have him.是什么意 求Reachal Yamagata 的 《You Won't Let Me》翻译, If you can't fix it,you gotta stand it.断臂山中的台词,我只知道大概的意思,请高手给个标准点的答案 Just wait and see,I won't let you get away with that.怎么翻译比较地道啊? Here is my new number .Have you written them down?还是Have you written it down?