实现党的十八大提出的到2020年全面建成小康社会的宏伟目标，必须实施科教兴国战略，把科技创新摆在国家发展全局的核心位置。这是因为（  ）

①主要矛盾对事物的发展起决定作用 ②辩证的否定观和辩证法的革命批判精神要求创新 ③科技创新能推动社会生产力、人类思维和文化的发展 ④科技创新能直接推动生产关系和社会制度的变革

不共面的四点可以确定平面的个数为 (    )

B

    Kate is an English girl. She lives in a tall building in the city of London. There are sixteen floors in the building, and she lives on the tenth floor. She uses a lift(电梯) to go up and down.

    Kate studies in a middle school near her house and she works hard. She goes to school early. Every day she leaves her home at half past six. She walks to the lift, and it takes her down to the first floor.

    There is a bus stop near the building. Usually she takes the No. 7 bus to her school. Classes begin at eight. She goes to play games at three forty. She gets home at a quarter past five. She begins to do her homework at eight and finishes it at half past nine.