问题
单项选择题
在组播网络中RPF代表什么？（）。
A.Reverse protocol forwarding
B.Reverse protocol flooding
C.Reverse path forwarding
D.Reverse path flooding
答案
参考答案：C
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在组播网络中RPF代表什么？（）。
A.Reverse protocol forwarding
B.Reverse protocol flooding
C.Reverse path forwarding
D.Reverse path flooding
参考答案：C
Dear May, How are you? I’m writing to you at my school. I’m a middle school ______. I am in a big class. There_____ about sixty teachers. My English teacher is Miss Gao. She is a ______teacher .She ______ helps us with English. We go to school ______Monday to Friday .There are four classes in the morning and three in the afternoon .We like to______ between classes. I have some friends at school .One of my friends is from ______. She speaks English. She is friendly ______ us. I usually play with______ .We often play basketball. It is my favorite ______. Please write soon. Lin Tao
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