A. 管理计算机系统的全部软、硬件资源,合理组织计算机的工作流程,以充分发挥计算机资源的效率,为用户提供使用计算机的友好界面 B. 对用户存储的文件进行管理,方便用户 C. 执行用户键入的各种命令 D. 是为汉字操作系统提供运行的基础
A. 汉语拼音字母顺序 B. 偏旁部首 C. 笔画多少 D. 以上都不对
A. because of B. instead of C. in front of D. at the end of
A. such; that B. so; that C. too; to D. not; but
A. too; to B. so; that C. both; and D. either;or
A. after B. before C. while D. whether
A. since B. while C. as D. when
A. while B. or C. for D. when
A. Both; and B. Not only; but also C. Neither; nor D. so;that
A. harder B. happier C. better D. worse