计算机操作系统是______。A．一种使计算机便于操作的硬件设备 B_爱下问搜题

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问题单项选择题

计算机操作系统是______。

A．一种使计算机便于操作的硬件设备

B．计算机的操作规范

C．计算机系统中必不可少的系统软件

D．对源程序进行编辑和编译的软件

答案

参考答案：C

解析：操作系统是直接运行在计算机硬件上的、最基本的系统软件，是系统软件的核心，也是计算机系统中必不可少的系统软件。而具有对源程序进行编辑和编译功能的软件称为语言处理系统。

完形填空

I still remember father spent plenty of time teaching me how to pronounce a word, how to understand something that I saw for the first time and how to be polite to others. And I will never 31   one sentence my father used to say to me, “I love you, son. Say you love me, son.” 32  , I would scream, “I love you, Dad.”
When I was growing up, I found that I had little in 33 with my father gradually. Sometimes we often argued about something sharply and then the argument changed into a 34 . I knew there was a gap between us. I didn’t 35 hearing the words “I love you” from my father the last time. To tell you the truth, I couldn’t honestly remember 36 I had last said those words to him, either.
Now father was in hospital. The doctor said it was 37 and he needed an operation at once, 38   he wasn’t sure whether my father was able to 39 it. Everything in my childhood 40 in my mind. Then I called and said, “Dad, I love you!”
There was a   41   at the other end and he replied coldly, “Well, I love you, too!”
I   42   and said, “Dad, I know you love me, and when you are   43 , I know you will say what you want to say.”
Fifteen minutes later my mother called and 44  asked, “Paul, is everything OK?”
A few weeks later I was working when I received my father’s call. “Paul, I love you.” I was so 45 that my tears rolled down my cheeks. Perhaps both of us 46 that this special moment had 47 our relationship to a new level.
A short while after this special moment, my father finally narrowly   48 death following the heart operation. I can’t 49 that if I didn’t take the first   50 and Dad did not survive the surgery, what kind of life I would lead now.

判断题

岩石是由一种或多种矿物或岩屑组成的有规律的集合体，是地质作用的产物。