用推论的方式，以大量的数据应用来说明设计意图，这是一种（）的设计方法 ["优选法","离散法","逻辑法","形象法"]
Which statement is true about The QoS Class Fibre Channel？（） [" Cannot be disabled"," Cannot have the CoS changed"," Can have "Packet Drop" enabled"," Is multicast optimized"," Can have the MTU changed"]
晶体的缺陷有哪些？以及各种缺陷对晶体性能的影响？
什么是特殊动火作业？
With VPLS， which protocol is used for label exchange and PW signalling？（） ["MP-BGP","LDP","Directed LDP","MTP","BGP","IGP"]
二人若不同心，岂能同行呢？记载在哪卷书？哪章？哪节？
