143. 如下圖以前方交會法進行數值法戶地測量，已知 A、B 兩點之平面坐標(E,N)分別為(0.000m,0.000m)及(100.000m,0.000m)。現觀測得α＝60°00'00"，β＝45°00'00"，則 P 點坐標為(A)(36.603m,63.397m) (B)(63.397m,36.603m) (C)(50.000m,86.603m) (D)(46.521m,72.213m) 。