After a seaman is discharged，at the end of the voyage，the final payment of wages due must be made at the earlier of within 24 hours after the cargo has been discharged or（）. within 4 days after the seaman's discharge。 prior to the vessel's departure on the next voyage。 prior to loading any out-bound cargo。 prior to any change of Master。
黄昏夜晚，萤火虫发出闪烁的光信号是：（） 照明行为。 觅食行为。 侵略行为。 求偶行为。
对于小型联锁店或者超市，更适合其需要的配送中心是（）。
系统软件为应用软件提供服务，下面的叙述中错误的是（） 系统软件与计算机硬件有关。 在通用计算机系统中操作系统是必不可少的。 操作系统是系统软件之一。 IE浏览器是一种系统软件。
A seaman is reported missing in the morning and was last seen after coming off the mid-watch. Which type of turn would you use to return to the trackline steamed during the night?（） Williamson。 Racetrack。 180°turn。 Anderso。
A seaman may not make an allotment to his（）.
