由于种种原因 ,对于计算型多项选择题总有部分同学出现漏解的情况 .本文针对这种情况以章节为序对这类题目进行分析 .一、在判断摩擦力的大小时 ,由于处理时的出发点的不同而造成多解例 1　质量为ｍ的木块在推力Ｆ的作用下 ,在水平地面上做匀速运动 (如图 1 ) ,已知木块与地面 Due to various reasons, there are some students who have misunderstood for the computational multiple-choice questions. This article analyzes these questions in order of chapters. First, when judging the size of friction, due to processing Due to the difference in the starting point, multiple blocks of mass m are caused to move at a constant speed on the horizontal ground under the action of the thrust force F (as shown in Fig. 1). Known blocks and the ground