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《血液循环器官》一课是小学自然教材中非常典型的解暗箱课,人体的内部器官以及血液的流动,是无法观察到的,尤其是血液在人体中的循环途径,单靠教师的讲述和学生的想象,并不能
“Blood Circulation Organ” is a very typical lesson from the primary school natural textbooks. It is impossible to observe the flow of internal organs and blood in the body, especially the circulation of blood in the human body. Student's imagination, can not