船舶在制定培训计划时,如何确定船上的培训需求?
电感负载阻抗与电源的频率成正比,电容负载的阻抗与频率成反比。
系统实施是根据系统设计将新系统付诸实现的过程,它是真正()。 ["完成数据库设计阶段","完成系统设计阶段","产生应用软件并投入运行阶段","进行系统切换阶段"]
如客户办理升级、降级、平级、到期换卡领卡时无法出示“‘一卡通’换卡申请确认回单”,是否需要办理申请书挂失?
The Rules state that certain factors are to be taken into account when determining safe speed. One of the factors is the(). ["radio communications that are available","maximum speed of your vessel","temperature","current"]
单片机由CPU.存储器和()三部分组成。