解释下列概念：总线宽度、总线带宽、总线复用、总线的主设备（或主模块）、总线的从设备（或从模块）、总线的传输周期和总线的通信控制。
下列选项不属于BIOS所提供功能的是（） ["加电自检","硬件设置与初始化","系统安装","系统启动自举"]
Who is responsible for the voyage plan?（） ["The person who has done the planning","The master","The navigation officer","The owner"]
如图所示，是工具软件DiskGenius运行的界面，则该硬盘扩展分区的容量为（） ["7GB","58.2GB","174.7GB","232.9GB"]
What is the direction of rotation of tropical cyclones,tropical storms and hurricanes in the Northern Hemisphere?（） ["Clockwise and outward","Counterclockwise and inward","Counterclockwise and outward","Clockwise and inward"]
为什么要设置总线判优控制？常见的集中式总线控制有几种？各有何特点？哪种方式响应时间最快？哪种方式对电路故障最敏感？
