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自从新编中学生物教材施用以来,对中学生物学教学起到了很大的作用,尤其是教材几经修改,思想性和科学性更强,教材内容丰富,解释清晰。本人在从事高中生物教学中,遇到了下述疑难,就此提出几点看法供大家商椎。1、高中《生物》(1985年甲种本)p104—105:“外胚层由蛙胚的外层细胞构成,……中胚层最初位于原肠腔的顶壁,后来位于内胚层和外胚层之间。”(着重点系白注,以说明疑难处,以下同)
Since the new middle school biology textbooks have been applied, they have played a very significant role in the teaching of biology in middle schools. In particular, they have been revised several times and have more ideological and scientific qualities, rich textbooks and clear explanations. I am engaged in high school biology teaching, encountered the following difficulties, put forward a few comments on this point for everyone to negotiate. 1. Biology in High School (1985a) p104-105: “Ectoderm consists of outer cells of the frog embryo. The mesoderm is initially located on the apical wall of the primitive intestine and later in the endoderm and ectoderm Room. ”(Focus on white note to illustrate the difficulties, the same below)