Between the steam dram and the smaller water dram below, large numbers of smaller diameter （） tubes are fitted. ["fire","water wall","generating","down comer"]
冲压生产时，操作者应注意些什么？
船舶通信设备及其位置均在防火控制图中有明确的标注。
不属于某种股利支付方式，但其所产生的效果与发放股票股利十分相似的方式是（） ["股票分割","股票回购","股票反分割","股票出售"]
Any partial loss or damage shall be（）pro rata on the basis of such declared value. ["adjusted","arranged","determined","fixed"]
什么是冲压工艺规程？包括哪几种基本文件？
