Worn main bearing will cause the compression ratio of an auxiliary diesel engine to（） ["increase","decrease","remain the same","increase on compression decrease on expansio"]
冷冻食品一般采用（）。 ["拉伸包装","立体包装","金属包装","泡罩包装"]
Allowance for fresh water refers to（）. ["the provision to be provided when the vessel sails in fresh water area","the fresh water to be carried by a vessel","the allowance of fresh water for each crew member when in distress at sea","the amount of free board decreased when sailing in fresh water area"]
（）是客室的核心设备，由电源、噪声检测处理单元、功率放大器、本地控制单元、对讲控制器和一些接口设备构成。
在默认情况下，WORD的“文件”菜单中只列出最近打开的（）文档。 ["两个","三个","四个","五个"]
帧中继网最适合于什么？有哪些特点？
