For electricity modernization of education and carrying out interaction teaching, wireless pointer based on HID (Human Interface Device) class should be designed.
针对教育电教化，实现互动教学，设计了基于HID(人机接口设备)类设备的无线教鞭。
Multi-dimensional array pointer and recursion are the difficult sections of teaching C language.
多维数组指针和递归是C语言教学中的难点。
The working principle and the fabricating method of the light-pointer teaching galvanometer are introduced.
介绍了光针式教学灵敏电流计的工作原理和制作方法。
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