单项选择题

For users, microkernel technology promises (11) , compact and sophisticated operating systems that are typically (12) across a range of hardware platforms.

A．quickly
B．speed
C．slow
D．fast
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单项选择题
(8) could find out syntax errors in a source program.
A．Complier
B．Operate system
C．Application
D．Explainer
单项选择题
Comment is nonprogram (78) embedded in a program to explain its form and function to human readers．
A．command
B．expression
C．text
D．statement
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