For users, microkernel technology promise { A }, compact, and sophisticated operating systems that are typically { B }across a range of hardware platforms. These operating systems will be customizable to let users run multiple operatin system and application "per-Sonalities" on top of a single microkernel { C } .Microkernel-based systems can provide this flexbility because the core operating.

　　System functionc are { D } from the large number of utilities, features and extension that are layered on top of them. As a result, updation and maintaining operating system is easier, since developers don't have to modify the { E } every time they must add a new feature.

　　供選擇的答案：

　　A：①slow ②fast ③quickly ④speed

　　B：①moveable ②made ③portable ④use

　　C：①bases ②foundations ③systems ④foundation

　　D：①separate ②connected ③compared ④selected

　　E：①core ②center ③heat ④utility

　　【解析】

　　參考譯文：對用戶來說，微內核技術有希望實現能在許多硬件平臺上移植的快速、緊湊和先進的操作系統。這些操作系統可以定制化，以使用戶可在單個微內核基礎上運行多個操作系統和應用程序。

　　基于微內核的系統之所以能夠提供此靈活性是因為核心的操作系統功能與大量用程序、特征和擴展功能是分離的。它們分層加于核心功能上，其結果是使更新和維護操作系統更加容易了。因為開發人員不必在每次加入一個新特色時都修改核心。

　　【答案】A：② B：③ C：④ D：① E：①