本书讲述的uC/OS 是一个操作系统，既然是系统，那就是一个整体，所以书中各章节 并不完全独立，章与章之间的内容皆有所交叉，只是各章均侧重本章标题对应的系统内核机 制。(The book is about uC/OS, which is an operation system. Since it is a system, it is a whole. So chapters in the book are not completely