【单选题】Fragmentation of the file system
A.
occurs only if the file system is used improperly
B.
can always be prevented
C.
can be temporarily removed by compaction
D.
is a characteristic of all file systems
【判断题】电流串联负反馈使放大电路的输入电阻增大,输出电阻增大。( )
【多选题】施工组织总设计技术经济分析中,常用的技术经济评价指标有( )。
【多选题】经济分析常用的评价指标有( )。A.经济内部收益率B.经济净现值C.经济效益费用比D. 费用效果比
【单选题】In Linux, which utility is used to check file system integrity?