【单选题】后张法预应力混凝土偏心受力构件,放张预应力钢筋时,应先放张()
【多选题】以下对险兆的描述,那些是正确的:
B.
险兆事故与工地重大伤亡事故只差一秒钟、只差一部之遥
C.
险兆事故与工地安全发现、工地检查发现安全隐患的区别看是否发生
【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】Some rare books cannot immediately identified as .
【单选题】Only teachers and postgraduates have ______ to the rare or the latest books in the library.