1个代谢当量的耗氧量数值为 ["A．1.5ml/(kg·min) ","B．2.5ml/(kg·min) ","C．3.5ml/(kg·min) ","D．4.5ml/(kg·min) ","E．5.5ml/(kg·min)"]
楔形角就是楔形滤片铅板的角度。
心动周期为0．5秒，左心室搏出量为40mL。左室心输出量为____mL。
正常人平均步速约为() ["A．1.0m/s ","B．1.2m/s ","C．1.5m/s ","D．1.8m/s ","E．2.0m/s"]
X线、γ线又称光子。
父亲为AB型。母亲为O型，其子女血型可能为____。
