交通速度：10

GeoGebra 命令及参数

1. Sequence((n, f(n)), n, 0, t_1) → markers_1
2. Sequence((n, g(n)), n, 0, t_1) → markers_2
3. Segment((-1.9, 0), (-1.1, 0)) → line_0
4. Sequence(i - 0.4 < x < i + 0.4, i, 0, t_1) → photo_{road}
5. Sequence(x = i - 0.4, i, 0, t_1) → left_{road}
6. Sequence(x = i + 0.4, i, 0, t_1) → right_{road}
7. Sequence(x = i, i, 0, t_1) → mid_{road}
8. If(t ≤ 7, 1, -1) → amb_{up}
9. Segment((-1.9, 200), (-1.1, 200)) → line_{200}
10. Sequence((n, j(n)), n, 0, t_1) → markers_3
11. Sequence(Translate[car_p, Vector[(0, j(0)), (i - j_y(i), j(i))]], i, 0, t_1) → photo_c
12. Sequence(Translate[truck_p, Vector[(0, g(0)), (i - g_y(i), g(i))]], i, 0, t_1) → photo_r
13. Sequence((i + 0.2, 105), i, 3, t_1) → crashphotos
14. Rotate(C_1, 180°, C) → G_1
15. Rotate(C_2, 180°, C) → G_2
16. Rotate(C_3, 180°, C) → G_3
17. Sequence(Translate[amb_p, Vector[(0, f(0)), (i, f(i))]], i, 0, Min[t_1, 7]) → photo_a
18. Sequence(Translate[downamb_p, Vector[(0, f(0)), (i, f(i))]], i, 8, t_1) → photo_d