Primary education ran from grades one through six; grades seven, eight, and nine were handled in intermediate or junior high schools.
初等教育是从一年级到六年级;七年级、八年级和九年级由中等学校或初级高等学校所管理。
2
At study entry, the slow progressors also had a longer estimated duration of symptoms than intermediate or fast progressors, as well as higher IQ and education.