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時充國年七十餘，上老之。（《漢書·趙充國傳》）

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在同样加工条件下，螺旋刃的切削阻力比直刃（）。

A. 大
B. 小
C. 一样

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在霜冻、雨雪后进行高处作业，人员应采取防冻和（）

A. 防寒措施
B. 防滑措施
C. 防创伤措施
D. 防风措施

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在鼓风机后的焦炉煤气系统，应设泄爆装置，设自动的连续式氧含量分析仪，煤气含氧量达（）时报警，达（）时切断电源。

A. 0.6%，1%
B. 1%，2%
C. 2%，5%

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You have a file server named Server1 that runs Windows Server 2003 Service Pack 2 (SP2).You need to implement a backup schedule on Server1 to meet the following requirements:·Everyday, back up all files and folders to disk.·Every Friday, back up all files and folders to tape.·Every Sunday, Tuesday, and Thursday, back up only the files and folders that have changed since theprevious Friday’s backup to tape.Which backup jobs should you create?（）

A. ·a normal backup to disk everyday ·a normal backup to tape on Friday ·a differential backup to tape on Sunday, Tuesday, and Thursday
B. ·a normal backup to disk everyday ·a normal backup to tape on Friday ·an incremental backup to tape on Sunday, Tuesday, and Thursday
C. ·a copy backup to disk everyday ·a normal backup to tape on Friday ·a differential backup to tape on Sunday, Tuesday and, Thursday
D. ·a copy backup to disk everyday ·a normal backup to tape on Friday ·an incremental backup to tape on Sunday, Tuesday and, Thursday

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