Only when you experience the bad earthquake taking place in Si Chuan______ the importance of life.

A．can you understand

B．are you understand

C．do you understand

D．did you understand

下列行为，属于医师擅自泄露患者隐私的是（）。

A.向患者家属交待病情

B.向关心患者的朋友透露检验结果

C.经患者同意，引用患者病例

D.经患者同意，实施医学观摩手术