【单选题】It cost me one pound, ______ 10 pence to have the letter posted.
【简答题】幼儿2岁半左右出齐20颗乳牙,6左右长出第一恒磨牙,即 。
【单选题】An SNMP alert has been generated by a server in the main data center.The alert stated that the internal temperature of the server has exceeded the threshold.No other servers in the rack have experienc...
A.
Rack cooling equipment failure
B.
Dust collection in the server
C.
Server processor failure
D.
Server power supply failure
【单选题】It cost me one pound, pl___s 10 pence to have the letter posted.
【简答题】2013年12月21日上午10时,省会首次启动重污染天气Ⅱ级应急响应,正式实施机车尾号限行,当天某报社为了解公众对“车辆限行”的态度,随机抽查了50人,将调查情况进行整理后制成下表: (1)完成被调查人员的频率分布直方图; (2)若从年龄在 , 的被调查者中各随机选取两人进行追踪调查,记选中的4人中不赞成“车辆限行”的人数为 ,求随机变量 的分布列和数学期望.