What is the difference between Cisco Catalyst 2960 LAN Base Series and Cisco Catalyst 2960 LAN Lite Series？（） [" Only the Cisco Catalyst 2960 LAN Base Series offers enhanced Layer 2+ intelligent LAN services."," Only the Cisco Catalyst 2960 LAN Lite Series supports Power over Ethernet."," Only the Cisco Catalyst 2960 LAN Base Series can be managed by Cisco Network Assistant."," Only the Cisco Catalyst 2960 LAN Lite Series supports Gigabit Ethernet uplink"]
根据不通的签名过程，多重数字签名方案可分两类：即（）和（）。
按气体排放方式分类，安全阀分为（） ["全启式","全封闭式","半封闭式","开放式"]
人体视野及视野范围
制定和实施资本充足率的作用主要体现在哪几方面？
摩擦学面临挑战
