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草履虫在显微镜底下的活泼性及其快速的运动是难以形容的,不大会使用显微镜的初中同学在很小的视野里观察倒是有些困难的;另外在一般初级中学中显微镜不太多;而每班人数都在五十人以上;因此要在一小时内使每个同学都能看到它的活动情况及构造是比较困难的。我们过去在上这门动物的实验课时,曾在载玻片草履史溶液中放上棉纤维。结果是当教师在显微镜底下找到而叫学生来看时,它却以较快的速度从棉纤维底下鑽来鑽去,不在视野之中;因此教师的指导工作就变成忙于替学生找草履虫,在这样的情况下,是不可能
Paramecium lively under the microscope and its rapid movement is unspeakable, junior high school students do not use the microscope in the small field of vision is somewhat difficult to observe; the other in general junior high school microscope is not too much; and each The number of classes is more than 50; therefore, it is difficult for each classmate to see its activities and structure within an hour. We used to put cotton fibers in the history of the slides when we were in the laboratory for this animal. The result is that when the teacher finds the student looking under a microscope and looking at it, the teacher learns to drill under the cotton fiber at a faster rate than the field of view; therefore, the teacher’s instructional work becomes busy with finding the Paramecium In such circumstances, it is impossible