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扇贝是怎样移动的
更新时间: 2020-10-12 00:00:00  

扇贝移动的时候会急剧的伸缩闭壳肌,使贝壳很快而有力的张闭,借贝壳张闭排水的力量在水中游泳。等它在新环境中适应后,便静卧水底,张开两扇贝壳,并且分泌足丝在水底固着。遇到敌人时,会迅速活动肌肉,反复开闭外壳,喷出壳内的水,形成一股冲击力,迅速逃离。

关键词: 扇贝 怎样 移动

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