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自己博士期间是做算法的，偏软件，专业属于电子工程，在１４０填写时就顺着选了　039-Electrical/electronic engineering, 但下个选项最相似的就是 compputer hardware.  这个140表报我搞得好矛盾，只能怪自己没想清楚。唉

在提交 485 Immediate action 和 final action 前两个月，  可不可以 把工作换成 more hardware 的就应该没问题 呢？

-The problem is that if the job duties in your employment letter for I-485 filing is not concerning hardware, USCIS may send you RFE. Nomrally USCIS will process your I-485 after you file it and may  pre- aprpove it, then formally approve it when your PD is current (i.e. earlier than Final action date).

多谢！