[名词解释] 低位发热量

全身一般情况很差或急性梗阻的直肠癌患者适用的术式是（） ["经肛局部切除术","Miles术","Dixon术","Hartmann术","拖出吻合术"] 下列各药，入汤剂用法错误的是（） ["旋覆花包煎","生大黄后下","鹤草芽入煎服","阿胶烊化对服","附子先煎"] 典型L型菌落呈（） ["圆状","油煎蛋样","多形性","颗粒型","丝状"] 人工流产术出血约500mL时可能是（）。 ["人工流产综合征","羊水栓塞","人工流产出血","闭经","吸宫不全"] 终板电位的叙述，正确的是（） ["表现"全或无"特性","具有局部兴奋特征","有不应期","是由Ca^{2+<\/sup>内流产生的","幅度与乙酰胆碱释放量无关"] 低位发热量}