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刚拿了米国签证，是B2，五年有效。但我的朋友都是B1/B2。请教B1与B2的区别？Thx.
enternet
(Enternet)
(#106661@0)
Last Updated: 2001-6-20
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刚拿了米国签证，是B2，五年有效。但我的朋友都是B1/B2。请教B1与B2的区别？Thx.
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