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"]
为了防止重要的文件被轻易窃取，WinRAR通过（）操作来保护文件 ["快速压缩","设置密码","分卷压缩","解压到指定文件夹"]
数据库管理系统是（）。 ["应用软件","操作系统","系统软件","编译系统"]
船舶日常防火是三副的责任。
由顾客需求升始，订单一产成品一组件一配件一零件或原材料，最后到供应商是（）。
