Here is a picture. It is a picture of my  1  This is my 2. My quilt is on it. Two baseballs are under it. They are white 3. Look at my desk. A4is on it. I like computer games. A 5is on it, too. It's 9:00. My 6is in my schoolbag and two7are in it. My books are8the floor. My keys are in the desk.9is my ID card? Do you10? Oh, it's in my English book. I like my room. It's nice.

在北京奥运会上俄罗斯的撑杆跳“女沙皇”伊辛巴耶娃又继续她的统治，她以5.05米成功卫冕。右图是伊辛巴耶娃在一次训练跳时撑杆握点的运动轨迹。图中相邻两条线之间的距离为17厘米，A点为起跳点，P点为离手点，F点为形变最大点。在起跳过程中，在F点和P点时伊辛巴耶娃的上升速度达到极小值，可视作为0。已知伊辛巴耶娃的质量是65千克。

说出下面春播时的做法所包含的道理：

①许多作物适宜春天播种，天寒地冻不适宜播种,____；②在播种前在地里往往浇一些水，使土壤潮湿或浸种____ ③播种前要耕和耙保持土壤松软____ 

根据图象进行以下探究：