心脏病患者手术耐受力最差的疾病是（）
A.房室传导阻滞
B.风湿性心脏病
C.高血压心脏病
D.急性心肌炎
E.冠状动脉粥样硬化性心脏病
参考答案：B
The old man,_______ abroad for 20 years, is on the way back to his mother land.
A．to work
B．working
C．having worked
D．to have worked
大中专毕业生自谋职业的如何办理落户手续？
