乙基叔丁基醚的合成

asleep和sleepy的区别 mr.olafkastner是什么意思 Mr je t'aime 撒意思? asleep 与 sleepy的区别asleep 与 sleepy 的区别? Thank you for being me back .和.I want to thank you for bring me back.这两句在语法上有什么不同,请做 Do you know today is my birtday什么意思 You are very ( ) to take the trouble to help me.I can not thank you 一个正方体边长是4.71厘米如果是正方形的边长与圆的半径相等,这个正方形的面积是这个圆面积的（） Yesterday my husband removed the gate and Rex got so annoyed we have not seen him since.这里的we have not seen him since前为什么不加逗号呢? 英语翻译1.光,是我们生活中不可缺少的物质2.光沿直线传播3.植物需要光成长4.我们需要光取暖,发电和照明 yesterday my husband removed the gate and rexgot so annoyed we have not seen him since.把since放在句前怎么改写 just put it that No I am not in the army...But trained,well just put it that way.这个句子里面的,怎么翻译? 夜之子和白马王子用英文怎么说! 白马王子和梦中情人的英文分别怎么说? 英语填空Bring all your text-books,t_____ with a dictionary. 英语小练习 填介词 1.Please bring the books（ ）if you come back.2.Did your mom填介词1.Please bring the books（ ）if you come back.2.Did your mom buy any presents ( )you?3.I got a strange letter ( )Santa!4.Thank you ( )your nice gift. 遥感图像上有薄云,在erdas中怎样去掉薄云?希望能说的详细一些～ Anson这个英文名怎样?Anson Liang这样会有歧义吗?或者读起来.. you are always young as this! anson这个英文名是什么意思?知道是人名，我是说这个人名的含义是什么。 But this you will want to know who中文意思 鹿鼎记里韦小宝是谁演的?韦小宝里的韦小宝是谁演的? 鹿鼎记中的韦小宝谁演的最好?我个人觉得是陈小春的版本最好?您觉得呢? SO翻印成中文是什么意思呢?`````` my teahcer mr moore中文什么意思 Just A Kiss 歌词 can you do anything right Can’t you do anything right? Can not you do anything right是什么意思 Lee 是"李"的意思,我想问问什么英文单词适合"郭"字 The magazine that I had been waiting for a----- just now.初中单词拼写 有两句歌词 i have been waiting for something for so long ,just give the answer i want .求歌名