平静呼吸时胸式呼吸以哪种肌的活动为主A.膈肌B.腹肌C.肋间内肌D.肋间外肌E.胸大 发布时间:2017-12-15 22:00 │ 来源:www.tikuol.com 题型:单项选择题 问题: 平静呼吸时胸式呼吸以哪种肌的活动为主A.膈肌B.腹肌C.肋间内肌D.肋间外肌E.胸大肌
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题型:单项选择题 关于子宫下段,不正确的是A.是由非孕时的子宫峡部形成的B.子宫下段在妊娠期被动拉长C.妊娠晚期子宫下段可扩张到8~10cmD.子宫下段与宫颈管之间形成生理性缩复环E.临产后子宫下段成为软产道的一部分 查看答案