英语周报2021-2022贵阳专用答案

Dear Sir/MadamI'm planning to travel to the USA in the coming JulyTherefore, I'm writing to inquire about travel routesof your agency.【要点一,发出请求ntend to stay in America for about 10 days, durig which I hope to have a look at some unique naturalscenery and have a taste of local customs【高分句型hich引导定语从句】.So, could you please recommend some suitable travel routes? In addition . Id like to know the prices of the routes, covering all the traveling expenses【高分句型二,现在分词 covering作状语】.【要点二,告知相关信息】A reply at your earliest convenience is highly apprecYours,Li Hua

6.B【解析】大肠杆菌为原核细胞,其细胞中没有内质网结构;破碎离心后的细胞,由于mRNA容易分解和ATP等能量物质匮乏会造成翻译无法进行,补充外源的mRNA、ATP、GTP和氨基酸后翻译活动仍可进行在只含有UUC重复碱基序列的mRNA上,会由于核糖体结合位置的不同,阅读出不同的密码子组合序列(如下图所示)ATP和GTP只为翻译过程提供能量,其15N不会形成氨基酸进入蛋白质。UUCUUCUUCUUCUUCUUCUUC苯苯…苯苯…苯…苯…苯…苯丝丝…丝…丝…丝…丝…丝亮…亮…亮…亮…亮…亮…亮

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