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生物科学是研究生命现象和生命活动规律的一门自然科学。由于它所研究的对象是自然界中的一切活体，故而教师在教学过程中，想方设法采用模型、标本、投影、录像以及多媒体课件等多种手段来增强课堂气氛，提高教学效果，这是生物课本身所体现出来的优点。然而，所有这些都是外?
Biological science is a natural science that studies the laws of life and the laws of life activities. Because the objects it studies are all living things in nature, teachers in the teaching process are trying to use models, specimens, projections, videos, and multimedia courseware to enhance classroom atmosphere and improve teaching effectiveness. This is the biological lesson itself. The advantages reflected. However, all these are external?