Which two features did WPAv1 add to address the inherent weaknesses found in WEP?()
A. a stronger encryption algorithm
B. key mixing using temporal keys
C. shared key authentication
D. a shorter initialization vector
E. per frame sequence counter
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静定结构的内力和反力与杆件的几何尺寸有关。
A. 正确
B. 错误
固定配属的专用货物列车应按规定涂打(),定期检修原则上均由配属段、专修段负责实修。
桥式起重机司机室位于大车滑线端时,通向起重机的梯子和走台与滑线间应设置防护板。()
A. 正确
B. 错误