以生产、生活实际和现代科技为背景的试题,选材灵活,立意新颖,着重强调本学科知识的综合运用,考查学生的综合能力和创新能力,是新课程标准实施后,近年高考考察的一个新热点.下面剖析一类知识块间通过信号转换而相互联系的综合题. The questions in the context of production, practical life, and modern science and technology are flexible in material selection and novel in concept. They emphasize the comprehensive application of knowledge in the subject and examine students’ comprehensive and innovative abilities. They are new to the recent college entrance examination after the implementation of the new curriculum standards. Hotspots. The following section analyzes the synthesis problems of a class of knowledge blocks that are related to each other through signal conversion.