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一、选择题 1.抽除叶片中的空气后放入盛有新制的冷开水的三角瓶中,研究环境因子对光合作用的影响。下表 4 组中 可以说 明 CO2 对光合 作用影 响的是( ) 1 光照 20℃水溶 新制的冷开水 2 厚纸遮光 20℃水溶 加少许NaHCO3粉末 3 光照 冰水降温 加少许NaHCO3粉末 4
First, multiple-choice questions 1. Remove air from the leaves and place it in a flask containing fresh cold water to study the effects of environmental factors on photosynthesis. The following table 4 shows that CO2 has an effect on photosynthetic activity () 1 Light 20°C water-soluble New cold water 2 Thick paper shading 20°C Water soluble Add a little NaHCO3 powder 3 Light Ice water cooling Add a little NaHCO3 powder 4