治疗洋地黄中毒所致的室性心动过速,首选的处理措施是
A.静注胺碘酮B.静注心律平C.静注利多卡因D.体外同步电复律E.静注β受体阻滞剂
参考答案:C
The old man has retired from the factory. He _____ there for 30 years.
A.works
B.worked
C.has worked
D.was working
全冠粘固后出现龈缘炎,其原因不可能是()
A.轴壁突度不良
B.冠边缘过长
C.冠边缘不密合
D.龈沟内粘固剂残留
E.咬合早接触