下列超过承载能力极限状态的是（） ["基础沉降量过大","地基失稳","隔墙开裂","柱受压弯曲"]
锅炉水处理用耐酸管道设计的要求是什么？
A ship station on receiving a shore-to-ship distress alert should（）. ["keep silence","interfere with such communication","establish communication as directed and render such assistance as is required and appropriate","refuse communication as directed and render such assistance as it required and appropriate"]
蒸汽减温减压器管道设计的要求是什么？
货物转向架组成后，上架体必须转动灵活，活心盘上架体还应（）滑动灵活。 ["侧向","左右","横向","纵向"]
锅炉给水泵进出口管道设计的要求是什么？
