For users, microkernel technology promises(90), compact and sophisticated operating systems that are typically(91)across a range

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问题 For users, microkernel technology promises(90), compact and sophisticated operating systems that are typically(91)across a range of hardware platforms. These operating systems will be customizable to let users run multiple operating system and application "personalities" on top of a single microkernel(92).Microkernel based systems can provide this flexibility because the core operating system functions are(93)from the large number of utilities, features and extensions that are layered on top of them. As a result, updating and maintaining operating system is easier, since developers don’t have to modify the(94)every time they must acid a new feature.

选项 A、core
B、center
C、heart
D、utility

答案A

解析 对用户而言,微内核技术有希望实现快速、紧凑和复杂的操作系统,这种操作系统能在许多硬件平台上方便地移植,还可以定制,以使用户可在单个微内核基础—亡运行多个操作系统和应用程序。基于微内核的系统之所以能够提供如此的灵活性,是因为核心的操作系统功能与基于它之上的大量应用工具程序、特征和扩展功能是分离的。这样,更新和维护操作系统变得更加容易,因为开发人员不必在每次加入一个新特征时都修改核心。
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