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以图形为背景的排列组合题在近几年高考中频频出现,它主要考察阅读、理解、抽象能力,综合性强,方法灵活,需要对问题中所给信息进行适当的分类加工处理.本文结合例题予以评析.例1某电子器件的电路中,在A、B之间有C、D、E、F共4个焊点(如图1),如果焊点脱落,则有可能导致电路不通,
The background of composition and arrangement of graphs has frequently appeared in the college entrance examination in recent years. It mainly examines reading, comprehension, and abstraction capabilities. It is comprehensive and flexible. It needs to classify and process the information given in the problem. Examples are to be evaluated. Example 1 In the circuit of an electronic device, there are a total of 4 solder joints between A, B, C, D, E, and F (as shown in Figure 1). If the solder joint falls off, it may cause the circuit to fail.