光合作用是历年高考的热点,常以图表的形式成题。在解答光合作用图表类题时,要遵循最基本的思路:(1)明确纵轴、横轴的含义,判断纵坐标代表的是净光合速率还是总光合速率,注意如果曲线用氧气吸收量表示光合作用速率,则纵坐标与平常的氧气释放量表示正好相反;(2)分析曲线的趋势以及与纵、横轴的关系;(3)分析关键点,如起点、折点、交叉点、终点;(4)图中显示多个变量时,要把多变量转化为单变量,同一曲线 Photosynthesis is the hot spot over the years college entrance examination, often in the form of a chart into question. In the answer to photosynthesis chart type, we must follow the basic idea: (1) to clarify the vertical axis, horizontal axis meaning to determine the vertical axis represents the net photosynthetic rate or total photosynthetic rate, note that if the curve with the amount of oxygen absorption Photosynthesis rate, the ordinate and the usual oxygen release that the opposite; (2) the trend of the curve and the vertical and horizontal axis analysis; (3) analysis of key points, such as the starting point, the turning point, the intersection of the end point ; (4) The figure shows multiple variables, it is necessary to convert multivariate variables, the same curve