高中生物“观察植物细胞的有丝分裂”实验中 ,按照教材上的操作 ,学生在做实验时往往只能看到一个个分散的正方形细胞 ,看不到染色体 ,影响了学生对实验价值的信任。经过多年的摸索 ,我们终于让学生在自己的显微镜下看到了真实的染色体和细胞的分裂相。做法如下。ａ .材料准备 In the experiment of “observing the mitosis of plant cells” in high school biology, according to the operation on the teaching materials, students often see only scattered one square cells and can’t see the chromosome when they are doing experiments, which affects the students’ trust in the experimental value. After many years of exploration, we finally let students see the real chromosomes and cell divisions under their own microscope. The practice is as follows. a. Material preparation