请问：怎样申请美国的Visa?准备六月份去美国开会，已经收到会议邀请信。 请问怎样申请去美国的Visa. 据说有几个国大认可的旅行社可以代办，具体是那几家？另外还需要哪些证明材料？ 第一次申请，还望各位过来人多多指点。越详细越好。 先谢过各位了。
come in
http://singapore.usembassy.gov/consular/nonimmigrant.shtml
read the category of "travle agent submission"
contact any one of them and they will tell you details on the documentation and application precudure.
read the category of "travle agent submission"
contact any one of them and they will tell you details on the documentation and application precudure.
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