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屏蔽效能SE
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考题
下列关于有源屏蔽的描述正确的是A、屏蔽线圈与超导主线圈中电流方向相同B、屏蔽线圈需要使用超导材料制作C、有源屏蔽的重量大于无源屏蔽D、有源屏蔽的屏蔽效能低于自屏蔽E、有源屏蔽线圈不需要浸泡在液氦中
考题
WhichisabenefitofusingtheIBMDS8000FlashCopySE(PTC－SE)()
A.FlashCopySE（PTC-SE）ismuchfasterthanthetraditionalDS8000full-volumeFlashCopyB.FlashCopySE（PTC-SE）alsosupportsbackgroundcopyC.FlashCopySE（PTC-SE）isoptimizedforuseincaseswhereahighpercentageofthesourcevolumeisupdatedduringthelifeoftherelationshipD.theadditionalcapacityrequiredforFlashCopySE（PTC-SE）mustonlybeplannedfordatawhichischangedonthesourcevolumeduringhostI/Otransaction
考题
电子整机产品中的屏蔽分为（）三种类型。A、高频信号屏蔽、中频信号磁屏蔽、低频信号屏蔽B、音频信号屏蔽、视频信号磁屏蔽、控制信号屏蔽C、数字信号屏蔽、模拟信号磁屏蔽、干扰信号屏蔽D、电屏蔽、磁屏蔽、电磁屏蔽
考题
Which is a benefit of using the IBM DS8000 FlashCopy SE （PTC-SE）（）A、FlashCopy SE （PTC-SE） is much faster than the traditional DS8000 full-volume FlashCopyB、FlashCopy SE （PTC-SE） also supports background copyC、FlashCopy SE （PTC-SE） is optimized for use in cases where a high percentage of the source volume is updated during the life of the relationshipD、the additional capacity required forFlashCopy SE （PTC-SE） must only be planned for data which is changed on the source volume during host I/O transaction
考题
单选题Which is a benefit of using the IBM DS8000 FlashCopy SE （PTC-SE）（）A
FlashCopy SE （PTC-SE） is much faster than the traditional DS8000 full-volume FlashCopyB
FlashCopy SE （PTC-SE） also supports background copyC
FlashCopy SE （PTC-SE） is optimized for use in cases where a high percentage of the source volume is updated during the life of the relationshipD
the additional capacity required forFlashCopy SE （PTC-SE） must only be planned for data which is changed on the source volume during host I/O transaction
考题
多选题电缆的屏蔽作用原理，电缆的屏蔽可分为（）。A静电屏蔽B静磁屏蔽C电磁屏蔽D金属屏蔽
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