问题
单项选择题
如果有多个中断同时发生，系统将根据中断优先级响应优先级最高的请求。若要调整中断事件的响应次序，可以利用( )。
A．中断向量
B．中断响应
C．中断嵌套
D．中断屏蔽
答案
参考答案：D
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如果有多个中断同时发生，系统将根据中断优先级响应优先级最高的请求。若要调整中断事件的响应次序，可以利用( )。
A．中断向量
B．中断响应
C．中断嵌套
D．中断屏蔽
参考答案：D
短文填空。
 We often hear people say "It's __1__ Cats and Dogs". But do Cats and Dogs __2__ rain? Of course not. It's an old saying. It means: it is raining __3__. Well, this saying came from old days in old England. People had hay (干草) roofs on their houses. The cats and dogs weren't __4__ in the house in those days, so they, the dogs and cats, would__5__ a warm place to sleep within the hay roof. The heat from the fire inside __6__ the roof warm in winter and the night air made the hay __7__ in summer. All in all, the roof was a nice place for an animal to sleep. But when it rained heavily, the roofs __8__ slippery. These animals would __9__ drop down from the roofs to find a drier place. So, when it really rains heavily, we say it is raining cats and dogs. Now do you __10__"It's raining Cats and Dogs"? |