2022七年级上册PEP版英语第14期周报答案

书面表达One possible versionDear JackI am glad to hear that you will come to our school as an exchange student next year. Since you want toknow about my school, i am writing to introduce some details to you.My school lies in the southeast of our city with convenient transportation, so it will be easy for you to comefrom the airport. The school, where various flowers and fruit trees can be found, provides a pleasantenvironment for students to study in. My school has three grades and almost 1, 000 students altogether andnearly two-thirds of graduates are admitted to key universities every year. Above all, they are friendly andhelpful. Therefore, if you have any difficulty adjusting to your future life, everyone, including me, will give youa handLooking forward to your coming.YoursLi hi

H23.(1)逆转录(1分)4种脱氧核糖核苷酸(1分)R-C-COOH(1分)NHa(2)一 AGACTTGTG(1分)(3)解旋酶、DNA聚合酶(2分)4a(2分)4)T淋巴(1分)会(1分)T淋巴细胞能分泌淋巴因子,促进B细胞的增殖、分化,参与体液免疫(2分)

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