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氯气干燥工序怎样去除NCl3

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1000kV变压器绝缘油中含气量标准是()。

A. 小于等于1%
B. 小于等于2%
C. 小于等于3%
D. 小于等于4%

What happens if all CTI ports for the configured CTI Port Group are busy when a new call arrives?()

A. Caller will receive network busy treatment.
B. Caller will receive ringing treatment.
CallManager will forward the call to the directory number configured for forward-on busy for this CTI Route Point in CallManager.
D. An exception is raised, but the call is accepted and processed.
E. CallManager will forward the caller to the directory number configured in IPCC Express for overflow

群体内改良的轮回选择包括()、()。利用隐性核基因控制的雄性不育特性进行轮回选择的比较简单实用的方法有:()、()、()。

变压器正常运行时,应是均匀的“嗡嗡”声。这是因为交流电通过变压器的绕组时,在铁芯里产生周期性变化的磁力线,引起自身的振动发出声响。

A. 正确
B. 错误

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