从中午12时开始,钟面上的分针转动172圈以后,钟面上显示的是几时?
172÷12=14(个)…4(小时)
答:钟面上显示是4时.
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.
A.core
B.center
C.heart
D.utility
实验的特点包括()。
A、主动变革性
B、控制性
C、因果性
D、不可重复性
E、数量性