题目

如图表示连续分裂细胞的两个细胞周期．下列叙述错误的是 （ ） A . b和c为一个细胞周期 B . c段观察不到染色体 C . 遗传物质平分发生在d段 D . DNA复制在a段 答案：AThis meeting room is a non-smoking area. I would like to warn you___________ that if you smoked here you would be fined.A. in general B. in detailC. in advance D. in total