急性心肌梗死最常见的心律失常是
A．心房颤动
B．房室传导阻滞
C．室性期前收缩
D．窦房传导阻滞
E．加速性室性自主心律
参考答案：C
按ISO标准规定的感度标记，S50的胶片应标注为（）
In relation to the Labour Contract Law of China:
(b) state any FOUR kinds of situations under which the labour administration may issue administrative orders to an employer for violations of Labour Contract Law. (8 marks)
