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【单选题】
查询式程序控制方式的核心思想是在执行I/O操作之前,( ),以确定是否可以进行数据传输。A.
内存始终处于就绪状态
B.
端口处于就绪状态
C.
CPU先查询总线的工作状态
D.
CPU总是要先查询外设的工作状态
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【简答题】多细胞真菌的结构包括菌丝和
【单选题】We ’ re talking about the pianist __will visit our school next week.
A.
which
B.
who
C.
whom
【简答题】选词填空,用所给词的适当形式填空 be satisfied with; equip; struggle; would rather; circulate; get rid of; hunger; expand; thanks to; export 1.There was ________ in the places where the crops were...
【简答题】Competition time! As Thanksgiving gets nearer,would you like to win a cupboard full of food and drink? Enter our competition and you'll have the chance to do a ten-minute trolley dash. That’s right,on...
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