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she zhan zheng yu xiang wei she dao dan
Author(s): 
Pages: 35
Year: Issue:  3
Journal: Ordnance Knowledge

Abstract: [关于蛇]属蛇亚目(爬行纲有鳞目的一个亚目,与蜥蜴亚目、蚓蜥亚目近缘)爬行动物。特征为天附肢,左肺退化或消失,内部器官伸长。体长约12厘米至9.5米。不同于鸟类和哺乳动物,蛇类终生在生长,但生长的速度逐渐减慢。各大洲皆有分布,而热带地区的种类最多。蛇的外形独特,少数有毒腺的蛇类又能使人中毒乃至死亡,所以蛇是许多民间传说的主要对象,如我国的《白蛇传》等。
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