司马懿砸缸
选修课：an elective course; a selective course; a selected course必修课：a required course; an obligatory course
大大大华哥呢
Elective。elective 英 [ɪ'lektɪv] 美 [ɪ'lɛktɪv]adj. 选修的；选举的；选任的n. 选修课程短语：Elective Affinities 亲和力 ; 有选择的亲和性 ; 有择亲和势Elective dictatorship 民选的独裁 ; 选举独裁 ; 民选独裁制elective operation 选择性手术 ; 预约手术例句：Political reporters in a democracy have one central mission: to provide citizens with the information they need to make an informed choice between the candidates for elective office. 民主国家的政治记者具有一项关键使命：向公民提供所需资讯，从而使他们在选举政府候选人时能够做出知情的选择。He has never held elective office, although he ran for president in 2000 and for the Senate, from Georgia, in 2004. 他从来没有过选举团队，尽管他曾在2000年竞选总统，2004年竞选乔治亚州的参议员。
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"Elective course"例句全部selective courseoptional course选修课包括太极拳和高级舞蹈练习。Electives are offered in Tai Chi and advanced dance exercise.
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