某大学化学系为了使三年级学生了解现代有机化学发展现状特去信与该市化工研究所联系希望安排呢学生前去参观

德语过去时一道题wir waren leider nicht viel zeit为什么是用waren 不是hatten我也很费解 德语的过去时怎么理解?说具体一点 ( ) he gone home ( A.Have,yet B.Has,yet C.Has,already D.Did,yet he may have gone home他大约是回家了这里的have不要可以吗? 形容时间流逝得很快的句子（不要名人名言） (1/2)If you do this you will be happy,I will pretend to know nothing th 可以用什么诗句或名人名言来形容方志敏形容方志敏的诗句或名人名言 They won't go home的反意疑问句是什么 求翻译：l hope they haven't gone without me You have nothing to fear,if you have nothing to hide.其中的语法!if 虚拟语气~麻烦帮我,剖析下!为什么不用时间的变化~我记得好像要变化的~ 英语翻译the base price shall be decreased at a rate of five(5) US cents per dry metric ton for each 0.01% S in excess of 0.09%,fraction pro tata.这个是其中一条,前面已经提过说S的含量最多0.04%. Jack practices playing the piano three hours every day.对划线部分提问three 是划线部分 I practise (playing the piano) every day.对括号部分提问() do you () () every day? 怎样提高英语的学术论文写作能力?求建议! 中国未来领导精英CFL项目到底是什么?具体的内容 谁知道China Future Leadership Project (CFL) 中国未来领导精英项目?这是个什么性质的项目?还有就是是自费还是公费的? No,l like playing the violin的问句 I like playing violin哪里错了 英语翻译1.把···扔到···上面2.掉到···上 What have you done with还是at with the broken computer? 英选____have you___the broken cup?I have thrown it wayA how do with B how done C what done withDwaht done “Tell me what you have done with his cap!” One afternoon a framer was going to get in wheat.His only son insisted on going there with him.He had to give in and took the boy to his field.The boy played by the boat while he was working.Some time la what have you done with the book? 美好的日子 500字作文不要抄头条搜索答案.可以抄了， 美好的日子作文500初一谢谢 作文 500字 《那段美好的日子》 美好的日子 作文500字 Do you always help your friends?做肯定否定回答 深圳市瀛石电子怎么样之前听朋友说这公司老板会抢客户, 勤学似春起之苗,不见其增,日有所长;辍学如磨刀之石,不见其损,日有所亏.的意思 勤学如春起之苗,不见其增,日有所长.辍学如磨刀之秋,不见其损,日有所亏.用了什么修辞手法 Talking problems with your best friend can __ __ __ solve them.与最好的朋友谈论问题对解决问题是有帮助的