选修课 英文选修课的英文是voluntary course吗?必修课的英文是required course吗?
2019-06-02
选修课 英文
选修课的英文是voluntary course吗?
必修课的英文是required course吗?
优质解答
选修课：an elective course; a selective course; a selected course
必修课：a required course; an obligatory course
选修课：an elective course; a selective course; a selected course
必修课：a required course; an obligatory course