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在生物裸的教学上,拼圆是一撞不可缺少的直观教具,但是由于一般印制的挂图篇幅都很小,不适于课堂教学用,于是老师们多是在课前自已动手来
Bare naked teaching, fight round is an indispensable visual aids, but due to the general size of the wall charts are small, not suitable for classroom teaching, so the teachers are mostly hands-on before class