【多选题】MCS-51单片机中断系统的中断源有( )。
【单选题】—Excuse me, is Mr Green in the office? —No. He Singapore for a meeting. He will be back in a few days.
【单选题】( )权力保障的最后防线。既是解决个人之间人权纠纷的有效渠道,也是纠正和遏制行政机关侵犯人权的有力机制。
【单选题】-Excuse me, does Mr Smith son live here? -He used to_______ here, but he gets used to ______ in a modern city.
【单选题】--- Excuse me, are these books ________? --- No, they are _________ classmate’s