Which two statements are correct regarding multicast implementation using a WLAN controller (v5.2) and AP?（） ["Multicast traffic is sent out on Cisco APs at the highest mandatory data rate.","Multicast traffic is sent out on Cisco APs at the highest supported data rate.","On Cisco APs， multicast traffic and beacons are sent out at the same data rates to maintain a common cell size for normal data as well as multicast data.","If there is more than one mandatory data rate， multicast traffic will be sent at the highest mandatory rate and beacons will be sent at the lowest mandatory rate.","On Cisco APs， multicast traffic will be sent out at the highest data rate that a client can maintain with the AP."]
术后病人的体温可略升高，称为手术热，变化幅度在0.5℃~1℃，一般不超过：（） ["37℃","37.5℃","38℃","38.5℃","39℃"]
计算机硬件系统主要由五个主要部分组成：（）、（）、（）、输入设备和输出设备。
Routers can be used to integrate a variety of services. Which two common services are often specified by businesses？（） [" Mitigation and Response"," Fibre Channel over Ethernet"," IP communications"," Data Center Virtualization"," VPN security"]
简述大学生人际交往的特点，大学生人际交往的影响因素以及大学生人际交往的原则和技巧。
公钥密码体制与对称密码体制相比有什么优点和不足？
