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近期多家网站、多所学校都引用了河北某一著名高中的一道生物高考模拟题:甲乙两图分别表示光照强度和空气中的CO2含量对某绿色植物光合作用的影响,丙图表示一天内某时间段蔬菜大棚内CO2浓度随时间的变化曲线。请据图回答下列的问题:
Several websites recently and many schools cited a biological college entrance examination simulation question in a famous high school in Hebei Province. The two figures respectively represent the influence of light intensity and air CO2 content on the photosynthesis of a green plant. A period of time in the greenhouse vegetable CO2 concentration curve over time. Please follow the figure to answer the following questions: