Why would a network administrator configure port security on a switch（）。 ["to prevent unauthorized Telnet access to a switch port","to limit the number of Layer 2 broadcasts on a particular switch port","to prevent unauthorized hosts from accessing the LAN","to protect the IP and MAC address of the switch and associated ports","to block unauthorized access to the switch management interfaces over common TCP port"]
什么是物流系统控制？
（）作为受弯构件变形和裂缝验算的依据。 ["Ⅰa<\/sub>状态；"," Ⅱa<\/sub>状态；","Ⅲa<\/sub>状态；","第Ⅱ阶段。"]
企业在申报示范工程时，就要结合工程项目的具体情况，制定出新技术应用的（） ["实施计划和目标","实施细则和目标","实施计划","目标"]
事业单位改革是（）的重要组成部分。 ["A.社会管理体制改革","B.文化体制改革","C.行政管理体制改革","D.科技体制改革"]
烧结矿碱度符号用（）表示。
