化学腐蚀

“今天下午我要去机场接人”怎么翻译?如题 Don't sleep in class =()()in class同义句转换 They don't often see each other now?请问：谓语是什么；often、see、now都在句中担任什么成分? If they don't understand each other w-----,it is impossible for them to help each other. he tries to in class but often failsA.to sleep B.doesn't sleep C.not sleep D.not to sleep did you like to p_____with dolls when you were little When I got to McDonald's,there were notany dolls.When I got to McDonald's,the dolls were ____ ____.(1)When I got to McDonald's,there were notany dolls.When I got to McDonald's,the dolls were ____ ____.(2)Predicting the future can be difficult and emb Keeping a baianced diet is good for us(改为同义句)Keeping a balanced diet is good for us(改为同义句) Are we all agreed on the best course of action ?帮帮忙翻译中文 I will strive to you from my heart removed and filling it for me of course,we are the best! 如何设计构建一个载体,将目的基因在植物根系表达并向根细胞外分泌?这是一道考研题,原题如下：设计构建一个载体,将目的基因在植物根系表达并向根细胞外分泌,也希望您请详细写出各步 什么是媒介策划?媒介策划一般包含什么内容?(或媒介策划书的内容) 用pCDNA3.1+质粒,设计单载体单启动子,共表达抗体轻重链实验方案如题,这就是老板布置的任务,还说有一些方法就是可以单启动子共表达轻重链.我看过一些嵌合抗体构建的文献,基本上都是用的 英语改病句：Are they in a different clothes?要把a换成什么吧 设计构建一个载体,将目的基因在植物根系表达并向根细胞外分泌. One of his feet was bigger than( )为什么这里填the other,不填another? Jim's( ) is red 用course造句造完course还要再造of course........ 请问这里用什么时态,为什么?How long ____ your aunt _____(keep) this book? They are English.汉语意思 Are they american or english 这句啥意思 以 —GAATTG— 的互补链转录mRNA,则此段mRNA的序列是 the teacher stressed the importance of being on "Hold on to the test for time being."怎么理解? "For time being. 语法分析I can't ensure his being on time.I can't ensure his being on time.这句话为什么要用being?请达人整个句子帮我分析下 it's made of the best w________ ride造句句子中ride的意思是旅程 启动子含有几个调节序列 TAAT序列都是启动子吗只要含有TAAT序列,这个位置就是启动子吗?还是在其他部位（比如基因内部编码序列）也可以有TAAT,但不是启动子.其他的如caat、gc box等都是同样的吗?分不多了,TATA,写错了 上游激活序列与启动子的异同?