大工17电源技术作业1

M={x|x=㎡+1,m∈N } N={y|y=n -4n+5,n∈N} 判断证明两个集合的关系. 用列举法表示集合A={x|x=4n,n∈N,x≤15} 已知集合A={x|x=m+（√2）n,m,n∈Z} 证明任何整数都是A的元素设M为任意整数,则M=M+0•√2,其中M∈Z,0∈Z,∴任意整数M∈A. 在△ABC,∠A,∠B,∠C的度数之比是1:2:3,AB边上的中线长为4,求△ABC的面积 已知0小于a小于45,sin(45-a)=1/3,则cos(45+a)=? ∫x/(x^4+2(x^2)+5)dx 7人排成一行,分别求出符合下列要求的不同排法的种数.（1）甲排中间； （2）甲不排两端；（3）甲,乙相邻； （4）甲在乙的左边（不要求相邻）； （5）甲,乙,丙连排； （6）甲,乙,丙两两不 用自己的语言描写汤姆索亚历险记第8章或第14章300字 一定要是自己的语言啊 解不等式｜3－5×｜＜8 问两个关于英文的语法题33.D与本题无关的内容请不要发,题看不清可以点击放大看. 计算:(-2)的2006次方+(-2)的2007次方 我新办的学籍,今年初四,C能上实验吗?真的不能呀？我想哭呀、 求下列不等式的解 这是高中的题 英语天才看过来啦!Though ___ sufficient time,the officer managed to read all the papers before midnight.A lackedB having been lackedC lackingD being lack of我想问应该选哪一个?还有就是lack的具体用法, 用英语翻译“法国化学和物理学家” 圆柱的表面积包括圆柱（ ）的两个面积和两个（ ）面积. 199又16分之15x（－8） 简便计算 底楼客房比二楼少5间有48在底楼,每房住4人,房不够住5人,有房间没住满5?某宾馆底楼客房比二楼少5间,某陆游团有48人,若按排在底楼,每间房住4人,则房间不够,每间住5人,有房间没住满5人;全安 英语天才们进来看看?由sie三个字母为首的短语有哪些 s i e 最好有好一点的词组 发挥你们的想象力吧我说的是由三个字母为首的短语 我要的是这种短语 《s一个词 i一个词 e一个词 》 是我没 各位英语天才进来看看吧用所给词的适当形式组成句子1.I,the,will,take,be,matter,of,promise,care2.sold,often,about,dreamt,the,home3.be,leave,Beijing,tomorrow,will,for,I4.problem,is,the,discuss,worth5.have,come,early,you,do,so,not,c 溃疡性结肠炎的饮食结构是什么 如何读好英语和物理?急~~~~~~~~~~~~~~ 谁能帮我翻译..学家(比如物理学家)的英语,能不能全一点, Dear,maybe this life I is to love you ,then follow you separation .Now,I'll look at your name ,with tears in her eyes .Not that I don't enlightenment,I am to don't regret.If not,time would if we stay I want to fly,fly in the sky,I know you will be at Never say love easily/Just be the girl you wanna be请为我翻译以上两句, terrible cold可数吗前加a,an或some I suffered from —terrible cold that day and my friends told me to go to___doctor'safter work.A不填,the B a,the C a,不填 D不填,不填 The man loses his temper用学过的英语解释句子I enjoy having breakfast at homeHe is in trouble.You should assist him.My bag is not the same as yoursI go to my grandpa s hourse twice a week what are you searching the internet for?I am trying to find out .A.what's difference between SARS and BIRDFLU B.how many persons have died in Iraq 都是问句为什么A不行为什么how many 不用改成the number of persons died in irap 1 wendy is one of the top student 2 three times four is twelve 3 paul loses his temper easily4 never stay up too late 5 don't interrupt me when i am speaking同意句6 my mother doesn't allow me to meet any net friends 7 my book is different from you He often loses his temper 的同义句 Although he sometimes loses his temper,his students like him_____for it.A not so much B not so little C no more D no less