《停车场建设和管理暂行规定》适用于城市和( )停车场的建设和管理。
A．商业区
B．工业区
C．闹市区
D．重点旅游区
参考答案：D
So confused ______ that he didn't know how to start his lecture.[ ]
A. since he became
B. would he become
C. that he became
D. did he become
下列各项中不属于石油化工生产装置停车后的安全处理主要步骤的是（）
A、隔绝
B、试压
C、吹扫
