单选题 Among the many subjects in school, mathematics is probably the most ______ , depending least on a student's back ground and culture.
【正确答案】 A
【答案解析】[解析] universal此处意为“一般的,普通的”,如:It's a subject of universal interest.这是一个引起广泛兴趣的题材。abstract作“抽象的”讲。arbitrary意为“专横的,任意的”,如:I didn't know anything about any of the books,so my choice was quite arbitrary.对于那些书我根本不了解,所以我的选择是很随意的。concrete则作“具体的,明确的”讲。