【单选题】【消耗次数：1】
在下面的I/O控制方式中，哪种需要CPU干预最少？
①
程序I/O方式
②
中断驱动I/O控制方式
③
直接存储器访问DMA控制方式
④
I/O通道控制方式
参考答案：
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相关题目
【单选题】
I/O与主机交换信息的方式中，中断方式的特点是____。
①
CPU与设备串行工作，传送与主程序串行工作
②
CPU与设备并行工作，传送与主程序串行工作
③
CPU与设备并行工作，传送与主程序并行工作。
【简答题】
I/O有哪些编址方式?
【单选题】
在查询I/O设备的有关状态，只有当状态满足条件时，才能执行I/O数据传送。则这种方式称为什么方式？
①
程序中断传送
②
程序直接控制
③
直接存贮器存取
④
通道控制
【单选题】
I/O与主机信息交换采用中断方式的特点是（）。
①
CPU与设备串行工作，传送与主程序串行工作
②
CPU与设备并行工作，传送与主程序串行正作
③
CPU与设备并行工作，传送与主程序并行工作
④
以上都不对
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【单选题】
In Africa, educational costs are very low for those who are ____ enough to get into universities.
①
ambitious
②
fortunate
③
aggressive
④
substantial
【单选题】
There were some ____ flowers on the table.
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artificial
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unnatural
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false
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unreal
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This is the nurse who ____ to me when I was ill in hospital.
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accompanied
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attended
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entertained
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shielded
【单选题】
、Although he had looked through all the reference material on the subject, he still found it hard to understand this point and her explanation only ____ to his confusion.
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extended
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amounted
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added
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turned
【单选题】
Because women often ____ their diet to control weight, they may not consume enough iron-rich food, and are liable to experience a deficiency.
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restrict
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strict
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stuck
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construct
【单选题】
He was such a ____ speaker that he held our attention every minute of the three-hour lecture.
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specific
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dynamic
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heroic
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diplomatic
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Radio, television and press ____ of conveying news as information.
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are the most common three means
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are the most three common means
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are the three most common means
④
are three the most common means
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He tried to _______relations with his former wife but he failed.
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measure
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maintain
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shelter
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reply
【单选题】
In the Chinese household, grandparents and other relative play ___ roles in raising children.
①
incapable
②
indispensable
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insensible
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infinite
【单选题】
My camera can be ____ to take pictures in cloudy or sunny conditions.
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treated
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adjusted
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adopted
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remedied