钠长石化带
VLAN Tagging， also known as Frame Tagging， is a method developed by Cisco to help identify packets travelling through trunk links. When an Ethernet frame traverses a trunk link， a special VLAN tag is added to the frame and sent across the trunk link .How does ERS use the VLAN tag？（） provide service internetworking。 support transparency for Layer 2 frames。 indicate destination as a connection identifier。 map to the DLCI in service internetworking。
什么叫后备保护？
化学沉淀物质
年满16周岁的人，是完全刑事责任能力人。（）
体积管检定系统压力和温度部件特性和组成部件特性必须符合有关规范，所有材质必须与处理的液体相适应，当处理（）时要特别注意
