点缺陷与材料的电学性质、光学性质、材料的高温动力学过程等有关，以下点缺陷中属于本征缺陷的是（）。 ["弗仑克尔缺陷","肖特基缺陷","杂质缺陷","A+B"]
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."]
自我价值保护
Pick the 4 valid ATM Cell Header fields：（） ["GFC-4 bits of generic flow control","Forward-explicit congestion notification（FECN）","VCI-16 bits of virtual channel identifier","CLP-1 bit of congestion loss","HEC-8 bit of header error control","ATM Discard Eligibility（DE）bit"]
中国学者研究认为中国成人的肥胖标准是（） ["体重指数大于等于25为超重，大于等于30为肥胖","体重指数大于等于24为超重，大于等于28为肥胖","体重指数大于等于25为超重，大于等于28为肥胖","体重指数大于等于24为超重，大于等于30为肥胖"]
怎样理解设计活动中的招标？
