化工原理第一章答案

He has been working out in the gym to stay( ) a.healthily b.healthy c.health选b,但我很纠结,这么多年,我学的一直都是keep health=stay health,而且做了无数的题都是health啊,这不是固定搭配吗,我郁闷了.但答案是对 my father has been working in the factory （since 1990） （对括起来的部分提问） 已知函数f(x)=x-（1/x+1）,g(x)=x^2-2ax+4,若任意x1 [0,1],存在x2 [1,2],使f(x1)>=g(x2),则实数a的取值范围都错了 答案是9/4到正无穷 你多长时间弹一次钢琴?英语怎么说—— ——do you play the piano?我们需要吃点东西.英语怎么说We need something—— ——.这是一棵圣诞树.—— —— —— —— ——.Are they happy or unhappy?——A.Yes,the Did you use to play the piano?______________.A、 Yes,I do  B、 No,I didn't  C、 Yes,I play it every day  D、 No,I do  At the moment I\'m working什么意思 The shower isn't working at the At the moment they are working at the moment.(改为一般疑问句） Peter ______ (can)finsh his work,because he was ill His mother is_____(worry),because he is ill .理由 朱自清的《春》描绘了春草 春花 春风 春雨 每个都用了什么手法还有写法 英译汉? 作文：我为妈妈(爸爸,爷爷或奶奶)——————600字!（文章供本人参考）PS:不要认为我会把回答者的文章直接抄!提供参考而已!必须是：我为妈妈(爸爸,爷爷或奶奶) 写一篇关于爸爸或妈妈或爷爷关心我的作文要贴合生活实际,题材新颖 He is babysitting his brother because she is ill.(改为同义句） because he is ill He wasn't at school yesterday because his mother was ill.(写出同义句）He wasn't at school yesterday ___ ___ ___ ___ ___. 怎样作文100分 Did you play the piano yesterday afternoon?No,i __.A.am going fishing B.visited my cousin C.will surf the Internet D.am done some cleaning He was ill because it was very cold.改同义句上面的一句话改成He was ill____ ____the cold weather.是不是题出错了啊?我觉得应该改成 He was sick forthe cold weather.才对啊. did he play the piano yesterday morning （肯定回答） 求一首歌,一开始就是i love...i love...i love...so i know i know you are waiting for..结尾是 i do i do i belong to you啥的,开头挺欢快的一首歌,找好久了, 笑别丁聪 they want to help homeless people 改为同义句they ___ ____to help homeless people 世界屋脊——藏族高原游牧文化旅游区有哪些特色旅游资源?青藏铁路开通后对该区旅游有何积极影响?400字左右 青藏高原地区太阳辐射为什么最强,地热资源为什么丰富?可开采什么能源? 快11111111111111111111111111111111 Is your classroom on the firsh floor?（中文) 朱自清 春 的第6自然段的写法是什么 朱自清《春》第一段突出了什么写法快 什么叫一元一次不等式组按数学书上的回答