单项选择题
MCU parallel I/O port line P1.0 to P1.3 connected to four LED, at this time it is what interface function?
未知题型 One button S1 controls 8 LEDs to display different patterns. When S1 is not pressed, 8 LEDs are fully turned on; when S1 is pressed, 8 LEDs cross on and off.
未知题型 服务报告填写时,为节省时间。收据一栏可适当简写,只需写准确配件/人工代码即可,配件/人工描述可忽略不计()
单项选择题 关于行政执法主体与行政相对人的关系,表述正确的是( )。