I am enjoying sports ______. 　　

教师节快到了，一年级同学买了下面这些花。现在要把这些花装在花瓶里，摆在老师的办公室。

回答：可以插____个花瓶。

①假笑啼中真面目   新笙歌里古衣冠     ②清新隽永诗书韵    朴素天真翰墨情

③白雪阳春传雅曲   高山流水觅知音     ④开幕几疑非傀儡    舞台虽小有机关

如图，一质量为M=1kg的光滑大圆环，用一细轻杆固定在竖直平面内；套在大环上质量为m=0.2kg的小环（可视为质点），从大环的最高处由静止滑下．重力加速度大小为g．当小环滑到大环的最低点时，大环对轻杆拉力的大小为（   ）

    In the future，life will be much ____. Maybe there will be vision phones in every ____. People can have a medical examination without a ____ or nurse in the room and do some shopping without ____their homes. And what ____education? There will be ____educational programs on the radio or TV. So many children who live in far-away villages don't need to ____to school every day. They can study at home. Each family has a robot. Robots will ____ people do their housework. Perhaps some people will fly to the ____for a holiday and some people can live under the ____.