环境污染及治理

克隆载体与表达载体的区别如题 cDNA连到表达载体上也可以将表达载体转化农杆菌进行复制和保存啊 怎么构建克隆载体和表达载体? 求高手翻译成英语 官方语言改革开放以来,民营企业从无到有,从弱到强,在中国政府开明、开放的政策引导下,取得迅猛发展.民营企业逐渐成为我国经济发展的新的增长点.然而,随着金融危机 英语是许多国家的官方语言　英文翻译 英语翻译Spanish ______ ______ as the official language there. not but 用的是就近还是就远 but是就前原则还是就近原则?not…but呢? not only but as well是使用就近原则还是就远原则 as well as连接两个主语时,谓语是?as well as连接两个主语时.谓语的单复数形式是取决于什么?人称的不同或是顺序?还是什么别的? as well as 连接两个并列主语时谓语怎么用 用 not only.but alsol 连接俩主语,谓语,宾语各造个句子 “狗真是我们的好朋友”用英语怎么说? 初一英语作文　　1、春节 （日期,干什么,习俗） 2、food and health 食物和健康（观点）有关春节的 I can't agree more的用法 英语翻译这个句子咋解释,为什么英语里面是 can't 否定,而翻译却是肯定呢? what‘s Tom father’s name?哪里错了? He used to ride to school when he was young but he is used to walking now.意思 英语句子中词的排列方法.就是形容词,名词在句中应该在哪?我不太懂写句子. 英语句子中,名词后接什么词,形容词后接什么词,动词后接什么词,等等.什么词修饰什么词? 作文《my favourite fruit》40字 I have to walk to school.(改为一般疑问句) 将以下句子用引号标出的动词改成被动语态,省略someone.⒈Someone “has prepared” a meal for you.⒉Someone “will translate” the book into English.⒊Someone “must send” a telegram to him.⒋Someone “had put out”the fi They will have been married for 20 years by then.如果这句话换成一般将来时算错吗 They will have been married for 20 years by then.可以换成They will have been marring for 20 years by then吗? 薄冰：They will have been married for 20 years by then.到那时他们结婚将有二十年了.1:will have been+过去分词是什么结构?2:为什么不是 will have married3:为什么使用by 4:为什么使用for 英语?They will have been married for 20 years by then.请问been在句中作什么成份, 英语翻译 he will have had 3 children nxet year 怎么句中两个havehe will have had 3 children nxet year 怎么句中两个have? 高手来分析 Four children,Tony,Jim,Mary and Kate,all have a birthday party.In one year's time Kate will be the age Tony is now.Mary is half of Jim's age and is three years younger than Kate.Kate is 11 year's old.What age will Mary be when Kate is 15 years old. 龙文中的宫商角徵羽 春晚上有这首歌的, Every___been tried since then.A.mean has B.mean have C.means has D.means have