【单选题】单片机片外扩展并行I/O芯片时,P2口只能作( ) 口使用,P2口输出的是( ) 。
【简答题】Translate the following sentences. 1. But one of the most telling lessons Ellen and I got in the difference between Chinese and American ideas of education came not in the classroom but in the lobby o...
【单选题】在8051单片机的四个端口P0~P3口中,只能用作通用I/O口的是哪个?
【单选题】Neither I nor he ________ to live in the hotel as it is very far.
【单选题】My uncle is ______ the owner and the manager of the hotel.
【简答题】The hotel is neither __________ (space) nor comfortable.
【单选题】当MCS-51单片机进行了外部程序存储器扩展时,P2口的作用是( )