The internal part of boiler should be cleaned by yard if found (). ["scaled","worn","deformed","rested"]
可以在税后提取的项目有() ["偿债基金","法定盈余公积金","任意盈余公积金","公益金"]
冲模工艺定位零件一般包括哪些?
坡屋顶建筑物建筑面积如何计算?
At normal sea going, we use () instead of donkey boiler. ["a heater","a pre-heater","an exhaust gas boiler","the coal burning boiler"]
纯盐酸是()的液体,因含FeC13及其它杂质,故常看到的工业盐酸略呈()。