问题 单项选择题

下面关于操作系统的叙述中,正确的是 ______。

A.操作系统是计算机软件系统中的核心软件

B.操作系统属于应用软件

C.Windows是PC唯一的操作系统

D.操作系统的五大功能是:启动、打印、显示、文件存取和关机

答案

参考答案:A

解析: 操作系统(Operating System,OS)是一管理计算机硬件与软件资源的程序,同时也是计算机系统的内核与基石。操作系统身负诸如管理与配置内存、决定系统资源供需的优先次序、控制输入与输出设备、操作网络与管理文件系统等基本事务。操作系统是管理计算机系统的全部硬件资源包括软件资源及数据资源;控制程序运行;改善人机界面;为其他应用软件提供支持等。 操作系统主要包括五个管理功能:处理机管理、存储管理、设备管理、文件管理和作业管理。 以前常用的操作系统有DOS,Windows 98、Windows NT、Windows 2000、现在常用的操作系统有Windows XP、 Windows Vista、Linux和UNIX。 计算机软件系统主要包括系统软件和应用软件。系统软件是由计算机设计者提供的,为高效使用和管理计算机的软件,主要包括操作系统、语言处理软件、数据库管理系统、网络通信管理程序和其他常用服务程序。应用软件是指为解决计算机应用中的实际问题而编制的软件,它是针对某一具体应用领域的、面向最终用户的软件,如财务软件、文字处理软件、辅助设计软件、图形软件等。

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完形填空(共10小题, 每小题2分,共20分)

根据短文内容,从A、B、C、D四个选项中选出一个能正确填入相应空格的最佳答案,并把答题卡上对应题目的答案标号涂黑。

Xiao Qiang,a l 2-year-old Chinese boy,has too many activities.His father  26  him away from school four afternoons a week and drives him across town to practice.“I do most of my  27  in the car when we are  28  to practice,and I have to do the rest when I get home.I am too tried, I just want to sleep.” He said.

“More and more kids become unhappy  29  they have too many activities to do.” said Mr. Wang,an expert(专家)of child development.“4l%of me children aged 9-13 said they felt  30 most of the time,and more than 75%0f them said that they wished they had more  31  to play.”

“Over-scheduling (过量的课程安排) is a growing problem for Chinese families.” said Mr. Wang.It is not good for both kids and their parents. More families eat dinner  32   or often eat fast food  33  their way to football practice or music lessons. We all know it is important for kids to learn how to relax. If they don’t learn that now, it will be more difficult to learn when they get  34   . Kids need time to relax. Parents should  35   about what is right for kids.

26. A. take                 B. takes               C. took                       D. has taken

27. A. sports               B. business    C. homework              D. housework

28. A. riding              B. flying                    C. walking                D. driving

29. A. but                  B. or                   C. because                  D. so

30. A. excited              B. interested         C. worried                  D. dangerous

31. A. great time         B. full time          C. right time               D. free time

32. A. slowly              B. quickly            C. quietly                   D. happily

33. A. on                   B. by                   C. in                          D. across

34. A. taller                B. stronger           C. older                      D. better

35. A. hear                  B. think               C. look                       D. tell