A:Dad, could I use your CD player
B:Mom, could you please clean my bedroom
C:Tom, could you please make your bed
D:Jack , could I borrow your bike
____ ____ kids learn to be independent,____ ____it is for their future.
①改变事物的状态,建立新的联系以促进事物发展
②注重各个要素的有机整合,实现系统的最佳功能
③抓住重点,发挥关键部分对整体的统率引领作用
④发挥主观能动性,着力改造事物之间的自在联系
我国生活在“世界屋脊”上的少数民族是( )