[问答题] 简述压扁层理和透镜状层理的成因。

护患非技术关系 影响材料预算价格变动的主要因素有（）。 ["材料生产成本","材料供应体制","市场供需状况","运输距离及方式","材料的消耗水平"] 知识准备 Cisco IDS sensors form the eyes and ears of your Cisco network intrusion detection system.Placing sensors correctly throughout your network is crucial to successfully implementing your Cisco intrusion detection system . Where can an IPS sensor be placed in an enterprise network?（） [" core layer"," bridging two VLANs on one switch"," between two Layer 2 devices withtrunking"," between two Layer 2 devices withouttrunking"] 下列标志中不属于质量标志的有（） ["3C认证标志","QS标志","商标标志"] 简述压扁层理和透镜状层理的成因。