工程类别划分是确定工程施工难易程度、计取有关费用的依据。
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Which are the two prerequisites before setting up Flashback Data Archive? （）(Choose two.)
A. Flash recovery area must be defined
B. Undo retention guarantee must be enabled.
C. Database must be running in archivelog mode.
D. Automatic undo management must be enabled.
E. The tablespace in which the Flashback Data Archive is created must have automatic segment space Management (ASSM).
零散型睫毛适用局部睫毛残缺的修补，也适合（）中睫毛的修饰。
A. 浓妆
B. 舞台妆
C. 淡妆
D. T台妆
在华为的交换机中，通过（）命令可以把端口的双工模式设为自协商.
A. duplex full
B. duplex half
C. duplex auto
D. undo duplex
一个是阆苑仙葩，一个是美玉无瑕，是出自哪部著名电视剧的主题歌？
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