2019一年级语文下册课文6《小壁虎借尾巴》第二课时课件新人教版.pptx

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21 小壁虎借尾巴,墙壁 捉蚊子 咬断 一条鱼 爬动 姐姐 您好 拨水 甩尾巴 吃草 赶走 房檐 傻孩子 转身,复习字词,赶蝇子,朗读课文,朗读课文,掌握方向,朗读课文,读一读,小鱼摇着尾巴,在河里游来游去。 老牛甩着尾巴,在树下吃草。 燕子摆着尾巴,在空中飞来飞去。,朗读课文,小壁虎借不到尾巴,心里很难过。他爬呀爬,爬回家里找妈妈。,朗读课文,朗读课文,小壁虎的尾巴断了,为什么可以长出新的尾巴?,壁虎的尾巴有再生功能。,为什么小壁虎的尾巴可以再生呢?,壁虎的尾巴含有再生性细胞,能通过激素的刺激使尾巴的细胞活跃,再长出新的尾巴。,课外知识,你还知道哪些动物也有类似的功能吗?,蚯蚓肢体,蜥蜴尾巴,课外知识,松鼠的尾巴,松鼠经常从树上跳上跳下,这条大尾巴可以加大松鼠的跳跃距离。,课外知识,课外知识,老虎的尾巴,老虎的尾巴能保持身体的平衡!,课外知识,袋鼠的尾巴,它既能在袋鼠休息时支撑袋鼠的身体,又能在袋鼠跳跃起帮助袋鼠跳得更快更远。,小壁虎长出了一条新尾巴,他高兴极了,他会把这个好消息告诉谁呢?他的朋友们又会说些什么呢?,课外练习,

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