基坑周边必须安装防护栏杆的开挖深度是超过（）m。
A.1．5
B.1．6
C.1．8
D.2．0
参考答案：D
The man gets angry easily. Nobody except his wife and son can _____ him down when he does. [ ]
A. turn
B. calm
C. hold
D. lie
麻痹性肠梗阻的临床哪项有错
A．无绞痛
B．可无发热
C．大小肠均胀气
D．肠鸣音亢进
E．可伴有尿潴留
