比例阀一般采用两端承压面积比相等的差径活塞结构。
（）年1月，日本防卫厅正式升格为“省” ["2005","2007","2009","2010"]
建筑物内，常见防火封堵部位有：（） ["电缆（桥架）、母线、管道穿楼板孔洞","电缆（桥架）、母线、管道穿墙孔洞","低压柜（盘、屏）等电气柜（盘、屏）底部孔洞","排气孔洞","电缆桥架阻火段"]
桑塔纳轿车的转向驱动桥由两个烛式独立悬挂组成。
I really hope that you will （）your trip to Canada and get back as soon as possible when people have to knowledge of the law. ["prefer","refer","enjoy","i nfer"]
银行业金融机构案防考核要素包括哪几方面？
