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∫dx／（e^x+e^-x）答案是arctan(e^+1)+c,虽然我也算出来了,但是我用另一种方法是算出1／2ln(e^x+1)+c,我是凑成分母是e^2x+1,分子是de^x,赐教~还有一题是∫dx／(x+1)(x+2),答案是将分母有理化,分成两个式 改革和开发的含义各是什么 我记得有表语补足语这一说,如i was happy to see you ,to see you就是不定式做表补那么my home is 2 miles away from the hospital 是不是 away from the hospital做表补啊还有away from这个短语是什么词性的啊,是副词 cheung 什么意思 这道不定积分怎么求我搞不懂为什么2∫变成了1/2∫,好多题的这一步骤都搞不明白求大神教 He always gives his seatto people on the bus.写他的同义句. Li Hong is always willing_(give)seats to people on the bus 杜姓在英文中怎么表达.比如说,周称为Chou,张称为Cheung,那么杜呢?同求冉姓英文表达. 英语翻译如：周杰伦的 jay chou 周润发大哥的 runfa chou 都是 chou 而不是 zhou 姓氏中周是chou. 姜 变成英文怎么说. 关于不定积分的性质∫ f'(x)dx＝f(x)＋c或∫df(x)＝f(x)＋c , 不定积分性质 Who's the man over there?It's Jack.Oh?_____ in Italy.Who's the man over there?It's Jack.Oh?_____ in Italy.A.I think he's B.I've thought he's beenc.I thought he wasd.I'd thought he'd been there was a man named ben的全文 Tow men named Jack and Joe这篇全文的翻译 我该怎样和同学好好相处啊 我真的希望能和新同学相处的很好的英语怎么写 当付出与回报完全不成正比的情况下你会怎么做 为什么付出和回报不成正比呢?总是付出的多,回报的少. 男孩英语怎么写? He is a generous man who is ready to helped people in needto 后面应该是help 撒 (1)lt is always a ___ to offer any help to people in the need.(please) 快 he is __is known as a kind and generous person,always ready to give a hand to those who need help.A,what,B,Who.为什么不用who. 为什么总感觉付出与回报不成正比 谁教我几道英语填空1.My grandmother isn't very_________,she can do housework.2.The day after Sunday is________.3.It's twelve o'clock.Let's have.4.Batty,get up and________thebed.5.It's sunny today.Let's have________. he is always和he always的区别如题..越学越回去了..连这个都忘了.看有的书上的句子有时是 he is always 有的是he always .. he is always ————（friendly）to people around him He is poor,but he is always __(mean) to donate money to the poorer people the are look playing boys football .)(连the are look playing boys football .)(连词成句) When tomorrow turns in today,yesterday,and someday that no moreimportant in your memory,we sudde In our class ,many boys are （ ）in playing football 、括号里面应该填、fun、interest、for、call 、填菏泽几个里面的那个、正确形式 Boral Plasterboard.No.4199,Chenhang Highway,Minhang District,Pudong,Shanghai.上海的具体哪?