2021-2022英语周报下学期七年级新目标答案

第二节书面表达One possible versionDear peterI know you are interested in ancient Chinese cultureThere is a good news that an exhibition of ancient Chineseinventions will be held in our school next Monday. It willlast for five days. We can visit it at any time duringthe exhibitionThe show will display some great inventions in ancientChina. including the world-famous Four Great Inventionsthe compass, papermaking, gunpowder and printing. Theyhad significant effects on the development of society. Forexample, thanks to papermaking and printing, a great dealof ancient information has been kept in books. These greatancient inventions made tremendous contributions to theworld civilizationooking forward to your replyLi hu

5.B【解析】吞噬细胞对抗原的识别没有特异性.A项错误;没有胸腺不能分化形成T淋巴细胞,细胞免疫和绝大部分的体液免疫丧失,B项正确;注射疫苗只能预防一部分疾病,C项错误;器官移植引起的免疫排斥属于人体正常的免疫反应,D项错误。

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