用中国七年级（初一）学生能听懂的方式讲解，使用中文---**Problem Description:** 如图，一只甲虫在5×5的方格(每小格边长为1)上沿着格线运动.它从A处出发去看望B、C、D处的其它甲虫，规定：向上向右走均为正，向下向左走均为负。如果从A到B记为：A→B(+1, +4)，从B到A记为：B→A(-1, -4)，其中第一个数表示左右方向，第二个数表示上下方向。 (As shown in the figure, a beetle moves along the grid lines on a 5x5 grid (each small square has a side length of 1). It starts from point A to visit other beetles at points B, C, and D. Convention: moving up and right are positive, moving down and left are negative. For example, moving from A to B is recorded as: A→B(+1, +4), moving from B to A is recorded as: B→A(-1, -4), where the first number indicates the left-right direction, and the second number indicates the up-down direction.) **Chart/Diagram Description:** * **Type:** Grid diagram. * **Main Elements:** * A 5x5 grid of squares. * Points labeled A, B, C, and D are located at intersections of grid lines. * Point A is located at the bottom-left corner of the grid. * Point B is located 1 unit to the right and 4 units up from A. * Point C is located 3 units to the right and 4 units up from A. * Point D is located 4 units to the right and 2 units up from A. * Grid lines form a 5x5 arrangement of unit squares. **Question (1):** (1)图中A→C(____, ____), B→C(____, ____), C→____(+1, -2); (1) In the figure, A→C(____, ____), B→C(____, ____), C→____(+1, -2); **Question (2):** (2)若这只甲虫从A处去甲虫P处的行走路线依次为(+2, +2), (+2, -1), (-2, +3), (+2, +1), 请在图中标出P的位置; (2) If the beetle's path from point A to point P is successively (+2, +2), (+2, -1), (-2, +3), (+2, +1), please mark the position of P in the figure; **Question (3):** (3)若图中另有两个格点M、N, 且M→A(2-a, b-4), M→N(5-a, b-3), 则N→A应记为什么? 直接写出答案. (3) If there are two other grid points M and N in the figure, and M→A(2-a, b-4), M→N(5-a, b-3), then what should N→A be recorded as? Write the answer directly.