我在指导学生实验课中 ,发现菠菜叶是一种观察植物下表皮和气孔的好材料。用菠菜叶制备植物叶下表皮和气孔临时装片的方法步骤如下 :1)准备好洁净的载玻片和盖玻片 ;2 )取洗净的新鲜的菠菜叶 ;3)用左手拇指和食指捏住菠菜叶的尖端 ,然后用右手的拇指和食指捏紧带叶柄的一端斜着 I am guiding the students in the experimental class and found that spinach leaves are a good material for observing the plant’s epidermis and stomata. The procedure for preparing plant epidermal and stomatal temporary slices using spinach leaves is as follows: 1) Prepare clean glass slides and coverslips; 2) Wash clean fresh spinach leaves; 3) Use left thumb and index finger Pinch the tip of the spinach leaves, and then pinch the petiole with your right thumb and forefinger