问:有次在家看DVD碟片《可可西里》,看到有个人被流沙吞没,感到很恐慌。流沙到底是怎样形成的啊?是不是较重的人会陷得快一些,较轻的人会陷得慢一些?答:在电影里,我们经常看到一堆既潮湿又会流动的沙子,在吞噬一个英雄,那就是流沙!不过幸运的是,现实中的流沙并不像你在电影中看 Q: There was a time when I watched the DVD “Kekexili” at home and I was panicked when I saw someone being swallowed by a quicksand. How does quicksand come into being? Is it true that heavier people will be trapped faster and those who are lighter will be slower? A: In the movie, we often see a pile of sand that is both wet and mobile. In engulfing a hero, that is quicksand! But fortunately, the quicksand in reality is not like you see in movies.