打算自己办NIW，在阅读官方网站（http://uscis.gov/graphics/howdoi/eligibility2.htm）的时候，读到一段话如下：“If you are a worker with exceptional ability in the sciences, arts, or business, you may apply to waive the requirement that you have a job offer if such a waiver would be in the national interest. To apply for a national interest waiver, you must submit Department of Labor Form ETA-750B. Please see the Department of Labor's Employment and Training Administration for more information.”这是不是说，必须添Form ETA-750B，此表要和I140一起寄。