2022-2023英语周报课标提升版第5期答案

2022-2023英语周报课标提升版第5期答案已经整理完毕，供同学们学习参考，更多英语周报答案，请关注本站。

1.B【解析】亚硝酸引起基因碱基序列的改变具有随机性和低频性,A正确;突变后的基因复制3次,后代中有1/2的DNA是错误的,B错误;由于密码子的简并性,突变后的基因可能不会导致新性状的出现,C正确;基因突变不会造成染色体结构变异,D正确。

Babe is one of my closest friend now. Whenever I feel down. I enjoy iis company. Whenever he is inriendsrouble, I would like A help him. Actually, he was an abandoning cat. I rescued him from hard situationstOa bondonedand nursed him back to health. It was in my friend ' s backyard which I found him. Then he was a baby ofthatless th: an a mo: th who he. looked so skinny ar:d sick. Seen him trembling with cold. I took him in withseelngwithouthesitation. Now he is 7 years old, health and happy. Quite often a naughty cat gets in fights with cats inhealththethe neighbourhood but frequently comes home with scratches in his thick, gray fur.语篇解读:主题:人与自然话懸:收桊流浪缅。本文是一篇记叙文。文章描述了作者改留的一只流浪绱7l. friend→ friends one of后的名词庶用复数,故 friend→ friends72. would like后加 to would like to do st.意为“乐意做杲事”,为固定用法。73. abandon ing- abandoned cat与 abandon之间为被动关系,故用过去分词作定语示"被遣弃的猫74. whict:→that本句为强调句型 It was...that,故 which→that75.去掉wio后面的 he who引导定语从句,并且在从勺屮作主语,所以此处he属于重复内容,故去掉he76. Seen seeing这里是非谓语动词作状语,sce和后面主勺的主语Ⅰ在逻辑上为主动关系,所以用 Seeing77.with:→ without句意:看到它冻得发抖,我毫不犹豫收留了它, without hesita:ion意为“毫不犹豫地故wti→ wIt:out7S. healt:a→ healthy由本勺中的" happy”可知,这里是and连接两个形容词作状语,故 heal: h→ healthy79.a·the此处的 naughty cat应该是指Babe,所以属于特指,需要用定冠词the80.but→and由本句中的 fights和 scratches可以判这里的连接词庶该为并列递进关系,故btad

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