【单选题】【消耗次数:1】
集中输入方式下,执行用户程序所需输入状态均在____中取用。
输入映像寄存器
输出映像寄存器
输入端子
用户程序存储器
参考答案:
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相关题目
【单选题】 CPU、系统程序存储器、用户存储器、输入输出元件、编程器和外部设备都属于PLC中的( )。
①  硬件和软件
②  硬件
③  软件
【判断题】 在工程实践中,常把输出映像寄存器称为输出继电器。
①  正确
②  错误
【单选题】 在输出扫描阶段,将( )寄存器中的内容复制到输出接线端子上。
①  内部存储器
②  输入映像
③  输出映像
④  变量存储器
【单选题】 存储管理中地址重定位必须在CPU中设置专门寄存器,而()不是此类寄存器。
①  基址寄存器
②  界限寄存器
③  页表控制寄存器
④  程序计数器
【判断题】 寄存器间接寻址中地址值在寄存器中。
①  正确
②  错误
【单选题】 下列哪个寄存器是属于指针寄存器( )
①  SI
②  DX
③  SP
④  ES
【单选题】 用寄存器传参,在子程序作现场保护时,____
①  传参寄存器必须保存
②  传参寄存器不必保存
③  传参寄存器可以改写
④  根据情况确定保存与否
【单选题】 寄存器间接寻址方式中,操作数处在_________
①  通用寄存器
②  主存单元
③  程序计数器
【多选题】 寄存器间接寻址方式中,操作数不在_______。
①  通用寄存器
②  内存单元
③  程序计数器
④  堆栈
【单选题】 寄存器间接寻址方式中,操作数处在_________
①  通用寄存器
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④  堆栈
随机题目
【单选题】 Yourroomis _______ thanmine.
①  three time big
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③  threetimesbigger
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【单选题】 This book is ________ that one. But __________ than that one.
①  as difficult as ;expensive
②  as more difficult as ; more expensive
③  as difficult as ; more expensive
④  more difficult as ; as expensive
【单选题】 This box is ________ that one.
①  heavy than
②  so heavy than
③  heavier as
④  as heavy as
【单选题】 -Whats your brother like? -He is _________.
①  adriver
②  very tall
③  myfriend
④  atschool
【单选题】 I will visit you if Father _________ me.
①  let
②  lets
③  is letting
④  will let
【单选题】 Now Mike isn’t here. He ________ Mr. Green’s. Perhaps he ________ back in a few minutes.
①  went to ; is coming
②  has gone to ; will come
③  has been to ; will be
④  is going to ; has come
【单选题】 This bright girl __________ the truth in front of the enemy.
①  didn’t say
②  couldn’t speak to
③  said
④  didn’t tell
【单选题】 Look out ! That tree _______ fall down.
①  is going to
②  will be
③  shall
④  would
【单选题】 Every time I _________ there, I will buy him something nice.
①  went
②  will go
③  go
④  have gone
【单选题】 The bridge which ________ last year looks really beautiful.
①  was built
②  built
③  was set up
④  had been built