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当发生火灾爆炸事件时或接到公司应急指挥中心指令时，现场应急指挥部迅速成立，总指挥由（）担任。

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由于工件材料.切削条件不同，切削过程中常形成（）、（）、（）、（）等四种切屑。

Identify a performance impact when using the Performance Schema.（）

A. There is no impact on performance
B. The overhead depends on the settings of the Performance Schema
C. There is an overhead for querying the Performance Schema but not for having it enabled
D. There is a constant overhead regardless of settings and workload

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3G门户网站是中国联通为3G用户手机上网提供的统一门户网站，并作为手机上网的（）。

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You completed your workflow definition. You want to save a copy of the definition to the file system for source control purposes. How does Oracle Workflow Builder save that file?（）

A. as a flat file
B. as a BPEL-compiled definition
C. as an XML file with an associated document type definition (DTD)
D. as an XML file without an associated document type definition (DTD)

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