分时系统中______是衡量分时系统性能的一项重要指标。_爱下问搜题

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问题填空题

分时系统中______是衡量分时系统性能的一项重要指标。

答案

参考答案：响应时间(Response Time)

解析：响应时间指的是在提交任务后，等待系统做出回应的时间。在分时系统下，多个用户分时共享同一个系统。每个用户在用完自己的分时时间段后需要等待别的用户用完它们的分时时间段，这个等待就是用户对系统的最直观感受，等待时间越长，用户感受越差。

完形填空

On a cold November afternoon, my mother and I were walking back home from a pizza store. We had bought many things. We were dressed       , and I was feeling a little         as I was carrying our shopping bag, so I decided to throw something away. I was walking towards a dustbin（垃圾箱）      I noticed a poor man walking out of the restaurant in front of us. He headed over to the nearby dustbin and started looking through it.
I suddenly felt very        because I was about to throw away a new drink just because it was too heavy. I walked up to him and handed the       and some bread over to him. The man looked up        and took what I gave him. A huge smile      on his face. I felt I couldn’t be happier with       . But then he said, “Wow, this is my son’s lucky day!”
With that, he thanked me happily and started off on his bike. I        heard him singing as he rode away. I got a warm       inside. I now understand what it        by the saying “Giving is getting”.
      it was only a little action, I got and learned more in those two minutes than I did in the rest of the month. Everyone in the world        help. Everyone can give help and everyone can be helped.
The look of that man’s happiness appears in my mind         I have the chance to do something nice. This is the power（力量）of        .

D．expensively

B．in surprise

D．in excitement

单项选择题

根据《税收征收管理法》的规定，税务机关征收税款时，必须开具（）

A.税款征收协议

B.增值税专用发票

C.普通发票

D.完税凭证