Eb1a申请材料要准备2份吗

我查到网上说要准备2份一样的邮寄过去

PLEASE NOTE: ANY DOCUMENTATION YOU SUBMIT SHOULD BE NO LARGER THAN 8 ½ x 11”.  SEND COLOR COPIES WHEN POSSIBLE.  DO NOT SEND US ORIGINALS EXCEPT RECOMMENDATION LETTERS.   PLESAE MAIL US TWO COPIES OF ALL DOCUMENTS, SINGLE-PAGED ONLY.

具体在这个网址：

http://trackgc.com/tr/ViewArticle.aspx?ArticlePk=89

所有跟帖： 

• One copy is enough. -863211- ♂ (0 bytes) () 01/08/2015 postreply 09:02:30

• Thank you Very much -oucruiser- ♂ (19 bytes) () 01/08/2015 postreply 12:55:35