A. common forwarding class
B. forwarding equivalence class
C. equivalent class characteristics
D. forwarding class characteristics
参考答案：B
AcommonforwardingclassBforwardingequivalenceclassC
本文来自网络，不代表煤炭资讯立场。转载请注明出处： http://www.mtxh.cn/zx/411379.html
