【多选题】用于控制访问程序存储器的引脚是( ),用于地址锁存的引脚是( ),用于外部 ROM 单元读控制的引脚是( ),用于复位的引脚是( )。 ( A ) RST ( B ) /PESN ( C ) ALE ( D ) /EA ( E ) XTAL1 ( F ) VCC
【单选题】Undergraduate students have no ______ to the rare books in the school library.
【单选题】Some rare books cannot be immediately identified as .
【单选题】The Huntington Library has an ______ collection of rare books and manuscripts of British and American history and literature.
【单选题】TTC法测种子生命力,通过温水浸泡过的健康玉米种子, 不会染色。
【单选题】Only teachers and postgraduates have ______ to the rare or the latest books in the library.