【判断题】【消耗次数：1】
DMA控制的主要形式是CPU停机方式。
①
正确
②
错误
参考答案：
复制
纠错
相关题目
【单选题】
DMA访问主存时，让CPU处于等待状态，等DMA的一批数据访问结束后，CPU再恢复工作，这种情况称作_____。
①
停止CPU访问主存
②
周期挪用
③
DMA与CPU交替访问
④
DMA
随机题目
【单选题】
Whenwearrived,wefoundthemeetingroomcrowdedwith______students.
①
quiteafew
②
onlyafew
③
few
④
afewquite
【单选题】
She_______ the door before she goes away.
①
had locked
②
is locking
③
has locked
④
was locking
【单选题】
—We all had a lot of fun at the barbecue ?yesterday. Pity you weren’t there.
—I really should have gone with ?you but I _______ on some remaining problems.
①
worked
②
was working?
③
would work
④
would have worked
【单选题】
When he was a boy,he used to go there and watch________.
①
to repair bicycles
②
bicycles to be repaired
③
bicycles being repaired
④
repairing bicycles
【单选题】
I didnt hear the phone. I________asleep.
①
must be
②
must have been
③
should be
④
should have been
【单选题】
We are confident that relations between ?North Korea and South Korea _______ through further?? efforts to reduce the long-term hostile ?attitudes.
①
are being improved
②
will be ?improved
③
have been improved
④
are improved
【单选题】
Yourroomis______mine.
①
twice as large than
②
twicethesizeof
③
biggertwicethan
④
astwicelargeas
【单选题】
The old farmer,________the badly injured and burnt soldier,came out of the burning farmhouse,calling continuously for help.
①
supporting
②
having supported
③
being supported by
④
being supported
【单选题】
They can’t leave until they _______ their work .
①
did
②
are doing
③
have done
④
his done
【单选题】
As I will be away for at least a year,Id appreciate________from you now and then so that I can know how everyone is getting along.
①
having heard
②
to hear
③
hearing
④
being heard