请简述P D C A循环方法的定义?
参考答案:
(Plan)计划、(Do)实施、(Check)检查、(Action)处置/纠正。
— What's this?
— __________________[ ]
A. It's a radio.
B. I watch TV.
C. I like to play with my friends.
为避免钢管管壁在环境温度变化及支座不均匀沉降时产生的过大的应力及位移,常在镇墩的下游侧设置()
A.支承环
B.伸缩节
C.加劲环
D.支墩