应用三(四)腔二囊管可能发生的并发症有
A．窒息
B．食管胃底黏膜坏死
C．心律失常
D．心肌缺血
E．吸入性肺炎
参考答案：A,B,C,E
David is a boss _____ his workers find hard to _____. [ ]
A. whose; please
B. that; be pleased
C. who; be pleasing
D. whom; please
旋转臂架式起重机的任何部位或被吊物边缘与10kV以下的架空线路边线最小水平距离不得小于( )m。
A．2 B．3C．4 D．5
