笔者在高中生物学教学中发现，学生对“联循环”中有关知识的理解时常出现错误。究其原因，多因教材中插图欠妥所致。现对此作一简单分析：高中《生物）（必修本）第267页图104‘碳的循环”存在明显的不妥之处。从此图出发，学生往往得出下列错误的结论：（1）CO2蓄库只有大气 The author found in high school biology teaching that students often misunderstand the relevant knowledge in the “Circular”. The reason is due to the lack of illustrations in the textbooks. This is a simple analysis of this: high school “biology” (required) on page 267. Figure 104 ’The cycle of carbon’ There is a clear disadvantage. Starting from this figure, students often draw the following erroneous conclusions: (1) CO2 storage only atmosphere