设随机变量X和Y相互独立，并服从参数为2的泊松分布，且U=X+2Y,V=X-2Y求E(U)、D(U)

there is no reason why other people should be the way I want them to be 请帮分析一下句型 英语翻译 they made them ___the house.A to leave B left C to live D leave they are only limited in terms of the materials used to make them.--make them后面省略掉什么?This assumption misses a significant difference between the two disciplines.Fine-art objects are not constrained by the laws of physics in the same way 我的哥哥把在河里游泳作为一种享受翻译成英语 英语翻译My brother _______ _______ bananas _______ _______. Ann's mother often____the No.5 bus to work.A、takes.B、brings.C、needs.D、helps if you work hard ,you will ____(success) in the exams your will ----- yourambition if you work hard “内蒙古自治区盐业公司”帮我把这些翻译成蒙语的, 谁知道这首歌中文名是什么 哪位大虾可以帮我把“内蒙古自治区建设工程质量安全监督总站”翻译成蒙语, 英语翻译不要以图片格式的，我已经下载了蒙科立软件。513401499@ QQ.com 功能蛋白至少具备几级结构,结构蛋白至少具备几级结构 重庆的秋季有什么特点 蛋白质的亚基结构是几级结构? 重庆的秋天可以从那几个方面来写 蛋白质结构1.一级结构改变空间结构一定改变么?为什么?2.为什么蛋白质的空间结构不不包括一级结构? 重庆的秋天在哪里 写重庆秀山的秋天500字左右怎样写? 小城的秋天怎么写?写秋天 It your hard work.A.from B.depend C.depend on D.depends on.选哪个 Your success in work depends very largely on_______(you) 这道题问的是：这句话中,you应用什么形式? 蒙古语翻译一个词 急能用蒙古语翻译下 英俊少年么 就像 可可西里代表美丽的少女那样 大概意思就行了 谢谢~~ 英语翻译求几个读起来朗朗上口的蒙古语,用来作为少年的名字,比方说铁木真之类的,要把原来的寓意写出来,用中文. people 1.a__ the world like to have celebration.in china,people celebrate chinese newyear.chinese new year is in January or February.They wear red clothes 2.b__red is the 3.c__ that will bring good luck.some 4.c__ get money in red envelopes for the c people 1.a__ the world like to have celebration.in china,people celebrate chinese new year.chinese new year is in January or February.They wear red clothes 2.b__red is the 3.c__ that will bring good luck.some 4.c__ get money in red envelopes for the 如何对杜甫的清明只改动标点,使它变成一首绝妙小词? success will not come of i___.we need to work hard . 重庆风景季节描写 50字 清明（杜牧）的赏析不是要诗句解释,主要是诗的创作背景啦、写作意境啦、诗人的情感啦··· 关于杜牧写的表达了什么感情?最好还有的...