以光合作用和呼吸作用知识为背景的试题历来是高考命题的重点和热点。这类试题有两个显著特点：两部分知识有机结合，以综合题的形式出现；信息的给予多以图像、曲线为载体，综合考查学生的识图、读图等信息的提取和处理能力，因而成为学生高考成 Experiments based on knowledge of photosynthesis and respiration have always been the focus and focus of college entrance examination propositions. There are two significant features of this type of test paper: two parts of knowledge are combined organically and appear in the form of a comprehensive question; information is given with images and curves as vectors, and the ability to extract and process information such as graphs and drawings of students is comprehensively examined. Thus became a student entrance exam