2022英语周报七年级仁爱版答案

书面表达One possible versionDear johnI'm glad to tell you that my family will visit London during this summer holiday, when we can get togetherwith you there. Taking advantage of this opportunity, I'd appreciate it if you can tell me much about British history, such as the formation of the UK and its cultural tradition as well as its local customsAs I am not familiar with London, please recommend some tourist attractions for me. Ive heard that Lon-don has a lot of attractions, especially famous ancient architecture. If it is convenient for you, please be ourguide, giving a detailed description of the scenic spots at any timeLooking forward to your replyYoursLi hua

9.A【解析】基因突变引起遗传物质改变,因此属于可遗传变异,但是如果突变发生在体细胞一般是不可遗传给下一代的;染色体数目变异不会引起基因排列顺序改变;基因突变和染色体变异对生物体的影响都很大,无法比较两者的大小;染色体数目变异和染色体结构变异用光学显微镜都可以判断出来。故选A

以上就是2022英语周报七年级仁爱版答案，更多英语周报答案请关注本网站。