管道对口前应将管道、管件内部清理干净，不得存有杂物。每次收工时，敞口管段不需要封堵。（）
参考答案：错
— What did Jack ask you just now?
— He wanted to know how long _____ when I reached the cinema. [ ]
A. had the film been on
B. the film had started
C. the film had lasted
D. had the film ended
下列哪项是《行政处罚法》公正原则的体现（）
A.坚持处罚与教育相结合
B.实行回避制度
C.行政处罚的规定要公开
D.听证公开程序
E.程序合法
