好好读读VB关于EB-1,2和3的注解

EMPLOYMENT-BASED PREFERENCES

First: Priority Workers: 28.6% of the worldwide employment-based
preference level, plus any numbers not required for fourth and fifth preferences.

Second: Members of the Professions Holding Advanced Degrees or Persons of Exceptional Ability: 28.6% of the worldwide employment-based preference
level, plus any numbers not required by first preference.

Third: Skilled Workers, Professionals, and Other Workers: 28.6% of the worldwide level, plus any numbers not required by first and second