文化多样性是人类社会的基本特征，也是人类文明进步的重要动力。下列名言中能够正确体现尊重世界文化多样性的有（    ）

①人的完美需要在文化中实现（席勒）

②各美其美，美人之美，美美与共，天下大同（费孝通）

③以天下之至柔，驰骋天下之至贤（老子）

④世界因不同而精彩，交流因不同而必要，创新因交流而迸发（孙家正）

冬天，菜农在蔬菜大棚里种植了黄瓜、番茄等蔬菜．请分析回答：

关于光现象，下列说法正确的是：（　　）

    Tom is a schoolboy.He is only seven years old, but he is very busy on weekdays.One Saturday he decided to relax himself, so he went to the cinema.

    It was the first time for him to do that.He bought a ticket and then went in.But after two or three minutes he came out, bought a second ticket and went in again.After a few minutes he came out again and bought a third ticket.Two or three minutes later he came out and asked for another ticket.Then the girl in the ticket office asked him, “Why did you buy so many tickets? How many friends did you meet?” Tom answered, “No, I have no friends here.But a big boy always stops me at the door and tears(撕) my ticket.”