【单选题】China should become a global leader in energy efficiency by 2050________nuclear power is likely to account for at least half of the country's energy. [ ]
【简答题】The leader of the majority party in Parliament will become the .
【单选题】JIT系统的需求均衡化,主生产计划在( )周内是有效与不变的,不出现提前、滞后等现象
【单选题】Little is known inside or outside North Korea about the young man _____could become the next leader. [ ]
【单选题】What year did Hitler become leader of Germany?
【单选题】以下关于BSS中“ 冲突”现象的描述中,错误的是___
B.
AP利用共享无线信道以“点对点”方式转发该帧
C.
如果有两个或两个以上无线主机同时发送就会发生“冲突”
D.
IEEE802.11的MAC层协议就是要解决多个无线主机对共享无线信道的争用问题
【简答题】IEEE 802.11 MAC 帧主要有:( )、( )、( )三种,它们之间时间间隔大小的关系为( )<( )<( )。