五世纪末,一个个日耳曼国家在西罗马帝国的废墟上建立起来,西欧进入了封建社会.看下图回答:

如图所示为正在分裂的细胞，其中R、r为一对等位基因。该细胞经正常分裂所产生的配子是（    ）

《隆中对》的作者是____朝的____家____。

下列有关生物进化的说法，正确的是

根据短文理解，完成各题任务。
C
    Sally is an English girl. She is my English teacher, Mrs. Brown's daughter. She is only five years old. (A)She can't go to school. She likes playing ping-pong.
    Her favorite ping-pong player is Zhang Yining. Sally is in the ping-pong club. She goes to the ping-pong club every day. She plays ping-pong for two hours there.
    Sally has a sister. Her name is Maria. She is in our class. She likes running. She runs with her mother every morning. (B)她最喜欢的赛跑明星是刘翔. Maria says she wants to be a running star like Liu Xiang.