龙头:疲惫的明明上了一下午的奥数课,好容易放学后坐上了回家的公交车。他坐在座位上想:妈妈晚上会怎么犒劳我呢?红烧大排、鱼香肉丝、油焖大虾……然后他焦急地希望司机能开快一点儿,可是,与他的想法正好相反:公交车突然紧急刹车!发生什么事情了?是红灯?是车祸?还是…… Faucet: tired obviously on the afternoon of the Mathematical Olympiad class, so easy to get home after school bus. He sat in his chair and thought: How could mum work hard at night? Braised rice, fish-flavored pork, braised prawns ... Then he anxiously hoped the driver would be able to drive faster, but contrary to what he was thinking : Suddenly the bus suddenly brakes! What happened? Is the red light? Is a car accident? Or ...