原图:https://imgur.com/a/VbCmv
At some point in your program, you make one or more calls to a funtion in the
RTOS that starts tasks, telling "it" which subroutine is the starting point for
each task and....
请问，这边的it指的是什么呢?

RTOS

请问怎么看的

RTOS. RTOS 是启动 tasks 的主体，在 program 中你呼叫 function 告知 RTOS 哪一个 subruoutine 是 task的起点

谢谢