John gets up early from Monday to Saturday, because he must go to school before 7:30 on weekdays(工作日) and go to Drawing Club at 8:00 on Saturday mornings. He usually goes to the bookshop on Saturday afternoon, and after dinner he watches TV until(直到) midnight(午夜).

    He doesn't get up early on Sundays. John's parents both work on Sundays. John always watches TV after he gets up. Then he usually goes to KFC to have a hamburger and some juice for lunch. After that, he goes back home and starts to play computer games until his parents come back. He does his homework after dinner. He usually has lots of weekend homework, so he must spend three hours on it. He usually goes to bed at about 11:00 p.m. on Sundays. He often complains(抱怨) he has too much homework to do.

根据短文内容，选择最佳答案。

所谓双星就是两颗相距较近的恒星，在相互间万有引力的作用下，绕连线上某点做匀速圆周运动．如图所示，两个质量不等的恒星a、b构成一个双星系统，它们分別环绕着0点做匀速圆周运动．关于a、b两颗星的运动和受力，下列判断正确的是（   ）

日本明治维新在社会生活方面提倡(    )

如果说，俄罗斯对欧洲的态度，  ①  表现出矛盾的两歧性：既向往和效法，又警惕和对抗，  ②  ，它对东方的态度和策略，  ③  没有那么复杂——它并不怎么理解东方文化，  ④  缺乏对东方的尊敬和平等意识；  ⑤  寻找一切可能的机会，将东方变成自己与西方博弈的力量资源