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烦你的神是什么意思 神烦狗是什么 三角形ABC中,AB=AC=12cm,AB的垂直平分线分别交AC,AB于D,E三角形ABD的周长等于27求BC 三角形ABC中,AB=AC=12cm,AB的垂直平分线分别交AC AB于D E,三角形CBD的周长等于27,求BC的长 伤身烦神的意思 一道微积分题为什么q的n次方的的二阶导数的和（当n从2到正无穷时）等于2/(1-q)^3 一道 微积分 题当x→0时,无穷小量 u=tanx与无穷小量 v=x之间的关系是?A.u是v比高阶的无穷小量 B.u是比v低阶的无穷小量 C.u是比v同阶但不等价的无穷小量 D.u是比v低阶的无穷小量 求一道微积分题1/（2+cosx） dx 的不定积分 最好有解题步骤, 英语周报2009-2010第3期答案是人教版九年级上的第三期周报作文 八年级上英语周报2009到2010,湖南专版, 非金属元素间 和 非金属元素的原子间 这两种说法的区别在哪 我开学该上高一了现在正在预习呢可是捏~那块看不太懂 从百度上找的也都看不太懂谁能用通俗的语言给我讲一讲撒~ “He goes to school from Monday to friday.”对画线部分提问怎么写?3天之内.是“from Monday to friday” He goes to school from Monday to Friday.(改为否定句）还有改为一般疑问句是He doesn't go to school from Monday to Friday.还是He doesn't goes to school from Monday to Friday. Mike goes to school from monday to friday.改为一般疑问句,并作肯定回答! (Luty0 goes to school from Monday to Friday根据括号提问 Wend,school,from,goes,Friday,to,to,Monday 1.The hospital is _____ our school.A.at the middle of B.in the front of C.next toD.after2.It's getting dark.You'd _____ go out.A.better not toB.better don'tC.not betterD.better not 3.To teach English is hard work for him ,_____?A.isn't it B.doesn't h 英语 有____(environment )problem ______(polluted)problem 为什么我们老师前一个填environmental后一个是pollution 一个形容词一个名词 有什么讲究嘛 高中英语外研社必修1～5和选修6～8的单词录音、和课文录音发给我一下吧.hsy1994214@foxmail.com 划线处不理解, 我喜欢某些玩具,但我不喜欢别的玩具I like ______ ______,but I don't like_____ ______.根据对话内容及所给首字母提示,补全所缺单词,使对话正确,完整Tom,what are you doing?I'm p_______ with my toys.Could you please d 划线部分不理解 并说出理由1.Though it was almost ten at night,Peter_____at the desk.A.has still worked B.had still worked C.was still working D.still worked2.Up to now one of the groups____ a decision where to go for a picnic.A.have not made B.has not made C.do 划线处不理解,一个方向加速一个方向减速,这先负功后正功咋知道的 英语问题询问（八年级内容）1.I got better r___ （这里填result,是单数还是复数形式?）of the examinations than Jack last term.2.—___ will she finish making the last movie?—In a week.A.How often B.How soon C.How long D.How m 划线处不理解,何为位移分量差·····划线处不理解,何为位移分量差,沿x轴方向,为初速v0*cosa,加速度d*sina,y轴方向也是类似的匀变速运动,那么为什么这条曲线是抛物线,求推导（解析式） The shop if close from 11a.m.till 8 p.m.这句话有没有错误?close能不能换成open? What time ( ) the shop ( ) on Sunday? A.do;open ,B.does; open C, is;close D,is;opened 3.5×1.5×4简便运算 公式,为什么的, 2CuH 2HCl=CuCl2 2H2//请问一：氧化挤,还原剂是?答案说是cuh既是氧又是还,但铜上升不就应该HCL的H下降吗?二：为什么会出现三种物质的化价变化,以前接触完全不同?麻烦详细文字说明,图片看不了