[名词解释] 齿状线

异丙肾上腺素对心脏的兴奋作用包括() ["A．心肌耗氧量增加","B．心肌收缩力加强","C．心率加快","D．传导加速","E．心输出量增加"] 肛裂三联征 肛裂 前哨痔 去甲肾上腺素的主要临床用途有() ["A．抗休克","B．治疗支气管哮喘","C．治疗阵发性室上性心动过速","D．治疗心力衰竭","E．治疗上消化道出血"] 齿状线