题目

Too many people want others to be their friends, but they don’t give friendship back. That is why some friendships don’t last very long. To have a friend, you must learn to treat your friend the way you want your friend to treat you. Learning to be a good friend means learning three rules: be honest; be generous; be understanding. Honesty is where a good friendship starts. Friends must be able to trust each other. If you don’t tell the truth, people usually find out. If a friend finds out that you haven’t been honest, you may lose your friend’s trust. Good friends always speak 一只自由飞行的小鸟，将随意地落在如图所示的方格地面上，每个小方格形状完全相同，则小鸟落在阴影方格地面上的概率是　．