题目

Where does the conversation probably take place? A . At a hospital. B . At a shop. C . At a post office. 答案：A6．已知点P（x，y）的坐标满足条件$\left\{\begin{array}{l}{x≥1}\\{y≥x-1}\\{x+3y-5≤0}\end{array}\right.$，那么点P到直线3x-4y-13=0的最小值为2．