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.

（90）是（）

A.slow

B.fast

C.quickly

D.speed

（2009河南平顶山高三质量检测）下列各句中加点的成语使用恰当的一句是（　　）

A．受今年第十五号超强台风“蔷薇”的影响，浙江沿海风生水起，气象部门发出台风黄色预警，要求海上所有渔船和工作人员回港避风。

B．虽然某些国内品牌手机可以一度与国外品牌分庭抗礼，但是由于品牌缺少“含金量”，其很难进入消费者心目中的“第一军团”。

C．“5·12”汶川地震发生后，国务院 * * 温 * * 立即赶赴灾区一线指挥救灾，他不顾心劳日拙，察看灾情，慰问灾民，极大地振奋了人民抗震救灾的信心。

D．易中天、王立群、纪连海等人在CCTV的“百家讲坛”上这么一讲就成了炙手可热、家喻户晓的人物，可见这个栏目有巨大的“造星”实力。