PTC陶瓷
PTC陶瓷
相关考题：
WhichisabenefitofusingtheIBMDS8000FlashCopySE(PTC－SE)() A.FlashCopySE（PTC-SE）ismuchfasterthanthetraditionalDS8000full-volumeFlashCopyB.FlashCopySE（PTC-SE）alsosupportsbackgroundcopyC.FlashCopySE（PTC-SE）isoptimizedforuseincaseswhereahighpercentageofthesourcevolumeisupdatedduringthelifeoftherelationshipD.theadditionalcapacityrequiredforFlashCopySE（PTC-SE）mustonlybeplannedfordatawhichischangedonthesourcevolumeduringhostI/Otransaction
PTC的描述，哪项是错误的（）A、PTC是一种自上而下的胆管直接造影方法，与ERCP类似B、肝内胆管扩张时，成功率可达90%左右C、适合于较重黄疸的鉴别和病变的定位D、PTC是一项损伤性检查技术E、PTC可能会出现胆汁外漏、出血等并发症
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
单选题Which is a benefit of using the IBM DS8000 FlashCopy SE （PTC-SE）（）AFlashCopy SE （PTC-SE） is much faster than the traditional DS8000 full-volume FlashCopyBFlashCopy SE （PTC-SE） also supports background copyCFlashCopy SE （PTC-SE） is optimized for use in cases where a high percentage of the source volume is updated during the life of the relationshipDthe 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
多选题关于PTC制热模块的描述正确的有（）A当两个PTC档位接触器都闭合时为PTC制热的三挡B当两个PTC档位接触器其中一个闭合时为PTC制热档位的一档或二挡C当温度超过90℃时，PTC制热模块内的温度开关将同时切断两个PTC档位接触器的供电D空调控制面板控制PTC档位接触器控制端的搭铁
问答题陶瓷材料制成PTC陶瓷材料有哪几个条件？