綠卡持有者可以離開美國6個月縮短為3個月一說屬實嗎？現要回國5個月，需要申請回美證嗎？

來源: pchan 於 2015-01-30 09:43:30 [舊帖] [給我悄悄話] 本文已被閱讀：次

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