材料一:大道之行也,天下为公,选贤与能,讲信修睦。故人不独亲其亲,不独子其子,使老有所终,壮有所用,矜、寡、孤、独、废疾者皆有所养。
材料二:今大道既隐,天下为家,各亲其亲,各子其子,货力为己,大人世及以为礼。
──《礼记·礼运篇》
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缩句
①比赛获奖的运动员兴奋得满街跑。
②客家人的民居体现了中华传统文化。
③他猛地想起常对儿子说的话。
I am Lily. I like Music and PE very much. But I don't like Maths. Lucy is my friend. She likes Maths and Music very much. But she doesn't like PE. We love to dance and sing after class. We are good friends.
下列函数中哪个与函数y=x相等( )