Which two statements about the Wi-Fi Multimedia （WMM） standard are true？（） [" Lower-priority traffic is assigned short interframe wait-timers to allow higher-priority traffic access to the wireless network first."," Packets that are not assigned to a specific access category are categorized by default as the background access category."," The WMM standard was implemented after the 802.11e standard was approved to provide support for non 802.11e devices."," WMM is a Wi-Fi Alliance standard that was implemented before the 802.11e standard was approved."," WMM uses Enhanced DCF （EDCF） to stipulate fixed and random wait times for the different access classes."]
企业的净利润归投资者所有，这是企业的基本制度，也是企业所有者投资于企业的根本动力所在。
憎水性硅酸绝热保温涂料是由（）等各种优质绝热材料及高分子聚合物复合而成。 ["A.海泡石绒 ","B.硅酸铝纤维 ","C.膨胀珍珠岩 ","D.有机硅 ","E.无机非金属"]
慢性病毒性肝炎的病程一般超过（） ["2周","1个月","2个月","4个月","6个月"]
当事人申请再审的，（）。 ["原则上停止裁判的执行","不停止裁判的执行","可以停止裁判的执行","应当停止裁判的执行"]
帕帕兹环路
