皮皮学，免费搜题
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【单选题】
报文交换的基本原理是A.
存储—转发
B.
建立连接
C.
拆除连接
D.
物理连接
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A.
they found that the people lived in the land of Shinar were friendly
B.
they were tired of a wandering life
C.
they wanted to be well-known
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