真空保安器的熔丝规格是3A，两根保险丝阻值差不得大于0.15欧姆。
If you see someone fall overboard from a vessel，you should（）. ["immediately jump in the water to help the individual","call for help and keep the individual in sight","run to the radio room to send an emergency message","go to the control room for the distress flare"]
Windows Server 2003动态磁盘支持的几种动态卷的特点。
为了在市场竞争中取得优势，经营者可采取以下合法的方式（） ["给予回扣","委托具有固定销售渠道的公司代理销售，根据销售额进行利润分成","加大媒体广告的投放力度","对特定购买人群适当降价"]
用吊斗运输时有何要求？
采用混凝土搅拌运输车运输有何要求？
