“铁钉效应”的故事源自英国曾经流传的一段民谣:“少了一个铁钉,丢了一只马掌;少了一只马掌,丢了一匹战马;丢了一匹战马,败了一场战役;败了一场战役,失了一个国家.”从这个故事中,我们看到了细节的威力.细节的威力无处不在,在考试中同样应该注重细节.一、问题“细节”例1某凸透镜的焦距为10厘米.当物体沿主光轴从距透镜30厘米处向透镜处移动时,则下述凸透镜所成像的变化情况中,正确的是() “Nail effect ” story from a section of the folk ballad that has spread in Britain: “ Lost a battle, lost a battle, lost a country. ”“ From this story, we see the power of detail. Details of the power everywhere, in the exam should also pay attention to the details. First, the problem ”Details" Example 1 The focal length of a convex lens is 10 cm. When the object moves along the main optical axis 30 cm away from the lens to the lens, the following is the correct image of the convex lens