A . 心尖部听诊音调低,强度响,历时长B . 心底部听诊音调高,强度弱,历时短C . 心尖部第一心音强弱不等,有短绌脉D . 吸气时心率增快,呼气时减慢E . 心尖部听诊S2后0.12~0.18s轻低调,历时短