1:大学生把一只蜘蛛放在实验台上,然后冲蜘蛛大吼了一声,蜘蛛吓跑了!
2:之后该大学生把这只可怜的蜘蛛又抓了回来,放在实验台上,把蜘蛛的脚全部割掉!
他再冲蜘蛛大吼了一声,蜘蛛不动了!
由此证明蜘蛛的听觉在脚上!
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