在作“光合作用”实验时,遇到阴雨天,或者上午第一、二节课,由于光照不足不易成功。可用以下方法准备备用材料:在实验的前几天,选择光照较好的天气,按照课本上的实验步骤把天竺葵叶子在阳光下照射好后,摘下这些叶子,放在大烧杯里,倒上开水烫一会,把细胞烫死,使已制造的淀粉不再消耗。然后取出叶子放入清水中或将叶子晾干保存。作实验时,如果是清水保存的可直接拿来用,如果是晾干的叶子事先用清水泡 In the “photosynthesis” experiment, encountered rainy days, or morning first, two classes, due to insufficient illumination is not easy to succeed. The following methods can be used to prepare alternate materials: In the first few days of the experiment, the choice of the weather is better light, according to textbooks on the experimental steps to geranium leaves shine in the sun, remove the leaves, placed in a large beaker, Hot water for a while, the cells burned to death, so that the starch has been manufactured no longer consumed. Then remove the leaves into clear water or leave the leaves to dry. For experiments, if it is preserved in water can be used directly, if it is dry leaves with a prior blister