#181 2007-07-06 14:40
哈哈,那个贴里面问题偶作出来啦
A man may lead a horse to the water, but he cannot make it drink.
#192 2007-07-06 14:41
现在小明一家过一座桥,过桥的时候是黑夜,所以必须有灯。现在小明过桥要1秒,小明的弟弟要3秒,小明的爸爸要6秒,小明的妈妈要8秒,小明的爷爷要12秒。每次此桥最多可过两人,而过桥的速度依过桥最慢者而定,而且灯在点燃后30秒就会熄灭。问小明一家如何过桥?
ps:灯要拿回去的
A man may lead a horse to the water, but he cannot make it drink.