• 2022-07-02
    测量心电图时,如走纸速度为25mm/s,灵敏度为X1则纵坐标1mm(一小格)和横坐标1mm(一小格)分别代表()
    A: 1MV,0.4S
    B: 0.1MV,0.04S
    C: 1MV,0.04S