The ascending order of priority about interpreter task and other relevant tasks is: the task of I/O port scanning, the task of keyboard scanning and text display, the task of communication and the task of interpreting.

• 解释及其相关任务优先级从高到低为:I/O端口扫描任务、键盘扫描和液晶显示任务、数据通信任务、解释任务。