美国餐桌礼仪文化

He has to do his homework after schoHe has to do his homework after school(改为一般疑问句) 谁能告诉我这几个字的读音给我标出来马上给分谢虞 薛 颖 琼 蔡 恭 Jim has been over his homework and he is free now这句可以等于下面那句吗?帮我挑挑刺,Jim has finished doing his homework already.He is free now my father will come back in a week的同义句 My father is in Hangzhou.He will come back ______(after,in) two days.选什么,为什么 小学英语作文.只用写五句话!要求：根据所给图画内容,用5句话描述Jim的房间.开头•已给出——This is Jim's room.the bag is on the chair.急用～ 设有一基因5'端和3'端部分序列如下：ATTG ACG ATT GGT GTA TCG.CTA ATT GAG ACC TAA 请设计一对PCR引物,写出其序列,使其扩增产物的5'末端加上HidⅢ位点（AAGCTT),3'端加上SmaⅠ位点（CCCGGG),一边酶切后插入 什么是基因的5'端和3'端呢? 【生物化学题目】对应蛋白质N端的是基因序列的5端还是3端? t,h,e,n,t这五个字母能组成什么单词?t，d，i，h，r能组成什么单词，p，i，t，c，r，u，e能组成什么单词。我英语不是很好，希望大家帮帮忙，尤其是第一个没有见过，实在不知道，急急急急… 根据下面提示的信息,写一篇介绍Jim Green的英语短文Name:Jin GreenTelephone Number:6654032Sports:tennis,basketballFood:hamburger,ice-cream,egg and saladFruit:bananas and apples开头已出：Hello!My name is Jim Green. 假如你是Jim,这是你昨天的活动,写一篇作文!英语的.早上起床,洗淋浴澡,吃早餐,骑车去学校,在上午给朋友写了一封信,下午在家为英语期末考试做准备,晚上看完电视以后睡觉.（我是八年级的, 写一篇介绍社区的英文作文, 已知的一段基因序列,如何分析它的启动子区,终止子区,开放阅读框,以及启动子上游的TATAbox?GTGAAACCAGTAACGTTATACGATGTCGCAGAGTATGCCGGTGTCTCTTATCAGACCGTTTCCCGCGTGGTGAACCAGGCCAGCCACGTTTCTGCGAAAACGCGGGAAAAAGTGGAAGCGGCGATGGCGG 急求生化基因表达启动子序列 DNA序列的同源性分析,以及上游启动序列的预测.高 分新手第一次弄,不太懂,主要任务是一段测得序列的分析,包括同源性,以及其上游启动序列的启动子预测和启动位点的位置,具体可以PM联系我 基因启动区上游远端序列如何调节改基因的表达 同一生物体不同基因是否有不同的启动子且各启动子都有一相同的保守序列 I'd like to walk.But since there isn't much timeleft,I'd rather we __a taxi.A.Walking;hire B.to walk;hire C.to walk;hire D.walking;hired不是would rather do ______we had to hire a taxi,for we missed the last bus.A As it being pretty late B It being pretty late C It was being pretty late D Being pretty late为什么?独立主格如果选B就是完整句了'就不对了啊'选其他地为什么不行? The taxi driver would rather he _____the passenger home yesterday.will drive,drove,had not driven,drives选哪一个?为什么?要准确点,After they arrived in Toronto,they went ______a tour of the cityon,off,in,at He doesn't like English 助动词可以换成have吗?助动词有哪些 学英语遇到的难点,助动词have、is等听不到发音.怎么办.我学的是新概念英语97版英音,现在学到第二册,录音中女老师的朗读我经常听不到have、is等的发音.我也在网上问过一些人,回答是弱读,而 英语首字母填空 When will your aunt come back?I am not s英语首字母填空 When will your aunt come back?I am not sure.Maybe b 5p.m.and 6p.m. 请问：基因A是可激活的,分子B可以激活它.在基因A的上游有一段序列CAGTCA,可被蛋白质C结合,设计三个实验证明序列CAGTCA有没有参与A的转录调控. ENJOY LIFE!COME ON! We'll go there take bus .改错 动词怎么变一般过去式形式? What does he look like为什么用的是助动词而不是be动词 英语单选：——How soon will he come back?—— _____ two o'clock.A After B In C For 翻译The Greens will come back after two months My dad will come come back home ( ) two hours.选in或after（说明原因）