清朝有效地加强了中央对地方，特别是对边疆的管理与统治，其中我们可以借鉴的有
①尊重各民族自己的社会习俗和宗教信仰②重视边疆地区的交通建设和军事防卫
③对分裂势力进行坚决军事打击④大事集权，小事放权

阅读短文，选择正确的答案。

    I'm a lovely girl. You can call me Li Li. I like the blue sky and white cloud. I also like colourful flowers. I love my family. I love my father and mother. I go to school from Monday to Friday. Our home is near the school. We have a house. It is a clean and beautiful house. The house has three rooms. One is a living room. The other two are bedrooms. In the living room,  there is a table and six chairs. There are some flowers on the table. There is a garden in front of the house. I often play games and take pictures in the garden. Our house isn't big, but we like it.

确立教育在社会主义现代化建设中的优先发展战略地位，提出“科教兴国”战略是因为