[名词解释] 滑坡

听眶线 宽容度 内脏性腹痛的特点是（） ["定位准确","常伴自主神经兴奋症状","疼痛较强","有反跳痛，肌紧张","腹痛随体位改变而加重"] 层流现象 二尖瓣狭窄患者，心尖区听到舒张期隆隆样杂音，该杂音的特点不包括（） ["杂音呈递增型","舒张中晚期出现","心尖区最清楚","向颈部传导","左侧卧位明显"] 滑坡