早上,你高高兴兴地出门,坐上公共汽车或者地铁去学校。车厢里人真多啊,就在你刚刚站稳脚跟的时候,几米远的地方,一个人忍不住,突然打了一个喷嚏。巧的是,回家以后,你就感冒了。而这次感冒的原因,可能就是车厢里的那个喷嚏。你可能会说,那人离我好几米远呢,不可能的事。那你知道吗,一个喷嚏究竟能打多 In the morning, you happily go out and get on a bus or subway to go to school. Many people in the car ah, just when you have a firm foothold, a few meters away, a person could not help but suddenly sneezed. Coincidentally, after going home, you have a cold. The reason for this cold may be the sneeze in the carriage. You may say, that person is a few meters away from me, it is impossible. Then you know, a sneeze can hit more