一、“串联式”过程题——时间顺序这类过程型综合题一般只涉及一个物体的运动,我们可按照物理事件发生的时间顺序,将复杂的物理过程分解为几个简单的物理子过程。[例1]如图1,在宽度分别为l_1和l_2 First, “tandem ” process questions - chronological process-based synthesis of such topics generally involve only the movement of an object, we can in accordance with the physical events occur in chronological order, the complex physical process is broken down into a few simple physics Sub-process. [Example 1] As shown in Fig. 1, the widths are l_1 and l_2, respectively