How does VO determine if you should get checked or not? changing

来源: iwant2know 于 2006-01-13 03:52:48 [旧帖] [给我悄悄话] 本文已被阅读：次

I wonder how VO determines whether you should get checked or not? Changing F1 to H1-B has higher chances to get checked? Please help, thanks a lot.

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