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【单选题】
在单级中断系统中，CPU一旦响应中断，则立即关闭________标志，以防止本次中断服务结束前同级的其他中断源产生另一次中断进行干扰。A.
中断允许
B.
中断请求
C.
中断屏蔽
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【简答题】It's Christmas Day . The children don't know ______ is in their stocking.
【简答题】以下文本框时说
【简答题】阅读短文，并根据短文内容完成文后的句子。 December 25th is Christmas Day. It's a western holiday. In many countries it is the most important (重要的) day in a year. All the people come back to their homes. On Christmas Day, ...
【简答题】记账凭证账务处理程序的缺点之一是登记总分类账的工作量较大。（ ） A．正确 B．错误
【单选题】What special day is it today?
A.
It's Christmas (圣诞节) Day.
B.
It's New Year's Day.
C.
It's Ted's birthday.
【单选题】-- What's the date today? --___________
A.
It's a fine day
B.
It's Friday
C.
It's on Christmas Day
D.
It's June 26tb
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