A.3小时B.4小时C.5小时D.6小时E.7小时
A.贵要静脉B.前臂掌侧静脉C.手臂肘前区静脉D.正中静脉E.头静脉
A.6点,16点,24点B.8点,16点,24点C.8点,18点,24点D.6点,16点,22点E.6点,16点,20点