從供選擇的答案中，選出應填入下面英文語句敘述中{ }內的正確答案，把編號寫在答卷的對應欄內。

　　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】

　　Examda提示參考譯文：��對用戶來說，微內核技術有希�实蠋密灾B磯嚶布�平台上移竹g目燜佟⒔舸蘸拖冉�的操尊嫷蛨鯱廡┎僮饗低晨梢遠ㄖ蘋�，以使記]Э稍詰ジ鑫⒛諍嘶�础娠@誦卸喔霾僮饗低澈陀τ貿絳頡?/P>

　　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