如图，在平面直角坐标系中，抛物线y=ax²+bx+c的顶点坐标为（2，9），与y轴交于点A（0，5），与x轴交于点E、B．

神经元的细胞体主要分布在白质中，其次分布中神经节中．

   Many parents make their children do chores around the house. For some families, teaching children what to do and how to do chores is easy. But in other families, getting children to do some housework can be a very big problem.
   It is a good idea for parents to teach their children at an early age. All family members must work together to make the house clean, and each person must do his or her share(份) of the work. We can do this by starting plan of chores and responsibilities(责任) when children are young.
   Chores are good for children—even very young ones. Doing chores can teach children many important skills(技能) like working together. Jobs also teach children what is fair(公平). The skills and value(价值) from doing chores will be good to children all their lives. 

表为我国某地二分二至日日出、日落时间（北京时间）和正午太阳高度，据表分析完成下题．