关于拟实制造，下列说法不正确的是（） ["拟实制造包含真实的加工过程","拟实制造综合运用仿真、建模、虚拟现实等技术","拟实制造的组织方式是由专业人员组成“虚拟现实”设计小组，通过网络合作并行工作","拟实制造运用计算机，应用虚拟模型"]
一般地，银行贷款利率和存款利率的提高，分别会使股票价格发生哪种变化：（） ["上涨、下跌","上涨、上涨","下跌、下跌","下跌、上涨"]
班主任应该把（）当作头等大事来抓。 ["品德指导","学习指导","安全与法规指导 ","健康指导"]
Which two statements are true about the function of CAC？（） ["CAC provides guaranteed voice quality on a link.","CAC artificially limits the number of concurrent voice calls.","CAC is used to control the amount of bandwidth that is taken by a call on a link.","CAC prevents oversubscription of WAN resources that is caused by too much voice traffic.","CAC allows an unlimited number of voice calls while severely restricting，if necessary，other forms of traffic.","CAC solves voice congestion problems by using QoS to give priority to UDP traffic."]
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what’s the role of link-address in Ipv6，is it necessary， why？
