单项选择题 The kernel is the(66)of an operating system such as Windows98, Windows NT, Mac OS or Unix. The kernel provides basic services for the other parts of the operating system,(67)it possible for it to run several programs at once(multitasking), read and write files and connect to networks and peripherals. Applications and utility programs use the services provided by the kernel to provide practical business functionality.In operating systems such as Windows or most versions of Unix, the kernel(68)everything except application and utility programs.In microkernel operating systems such as Digital Unix and Apples forthcoming Mac OS Server, the kernel(69)supports only multitasking and memory management. Other services such as applications, utilities and the user interface support device drivers, API and graphics which all(70)outside the microkernel.

单项选择题 DW的多维数据模型将数据看成数据立方体形式，由①和②组成。

单项选择题 一个基本的计算机硬件系统，从功能的角度包括（）五大功能部件。

填空题 “窗体布局窗口”客户区域的左上角代表桌面坐标的（）。

单项选择题 I/O系统主要有(24)、(25)和(26)三种方式来与主机交换数据。其中(24)主要用软件方法来实现，CPU的效率低；(25)要有硬件和软件两部分来实现，它利用专门的电路向CPU中的控制器发出I/O服务请求，控制器则(27)转入执行相应的服务程序；(26)主要由硬件来实现，此时高速外设和内存之间进行数据交换丝(28)。