下列关于高等动物细胞增殖的叙述,错误的是( ) A. A. 有丝分裂前的间期和减数分裂前的间期,1次染色质DNA的复制 B. B. 细胞周期的G 2 期已经形成了1对中心体,在有丝分裂前期形成纺 锤体 C. C. 染色体数为2n=24的性原细胞进行减数分裂,中期Ⅱ染色体数和染色体DNA分子数分别为12和24 D. D. 若在G 2 期某染色质的1个DNA分子发生片段缺失,则该细胞有丝分裂产生的2个子细胞均含有该异常DNA
【单选题】听力原文:Man: Were you home last night? Did you watch TV? Woman: No, I was out having dinner with some friends. Did I miss a good program? Man: Yes, there's a great comedy on every Wednesday at six. You k...