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【单选题】
由美国国防部资助建立的一个名为ARPANET（即为阿帕网）的基于（）的网络，阿帕网就是今天的Internet最早的雏形。A.
低速串行连接
B.
电路交换
C.
分组交换
D.
MPLS转发
拍照语音搜题，微信中搜索"皮皮学"使用
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B.
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