【单选题】【消耗次数：1】
关于分节运动的叙述，错误的是（ ）
①
是一种以环行肌为主的节律性舒缩活动
②
是小肠所特有的
③
空腹时即有明显分节运动
④
分节运动存在频率梯度
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相关题目
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关于大脑皮层运动区的功能,下列哪项叙述是错误的
①
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