题目内容

A system administrator needs to backup datavg which contains a database that pre-allocates files by padding them with nulls, similar to treating them as sparse files. In order to effectively backup and be able to restore the datavg files, which backup method should be used?()

A. savevg
B. tar
C. cpio
D. mksy

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分析天平最小称量到多少克?

根据对比剂-血管直径曲线,确定对比剂最低剂量的条件()

A. 血管直径无关
B. 血管直径成正比
C. 血管直径成反比
D. 血管内对比剂浓度成正比
E. 血管内对比剂浓度成反比

焦碳下降至高温区时与铁矿石和溶剂一样全部软化并熔化成液体。

A. 正确
B. 错误

简述行为责任和结果责任的区别。

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