http://www.greencardforphd.com/downloads/GreencardforPhd_ebook. 在网上又找到了上面这个pdf文件,里面写到 ETA-750b: This form is used for employment certification and is generally filled by employer. In the case of self-petitioning, this form is usually not necessary but is optionally filled by some applicants. 这样看起来好像说,如果我自己petition就可以不用填这个表格。