shuxuejianmo_7

说明：  （插值） 在某海域测得一些点(x,y)处的水深z由下表给出，船的吃水深度为5英尺，在矩形区域（75，200）*（-50，150）里的哪些地方船要避免进入。 ((Interpolation) measured the waters in a number of points (x, y) the Agency' s water depth z is given by the following table, the ship' s five feet depth of water in the rectangular area (75,200)* (-50,150) in where the ship to avoid.)