15．"White collar"is a near-synonym for middle class，and"blue collar"for working class．Thedistinction（區(qū)別，差別）comes from the work"uniforms"traditionally worn in each environment．

分析 "白領階層"是中產(chǎn)階級的同義詞，工人階級是"藍領階層"，這種區(qū)別來自于傳統(tǒng)的"制服"．

解答 distinction 考查名詞．根據(jù)句意："白領階層"是中產(chǎn)階級的同義詞，工人階級是"藍領階層"，這種區(qū)別來自于傳統(tǒng)的"制服"．distinction是名詞"區(qū)別，差別"．

點評 本題考查名詞的詞義．名詞詞義題一直都是高考考查的一個熱點，它注重考查考生結合語境準確選用詞語的能力．由于英語詞匯豐富，且用法多變，考生掌握起來有較大難度，因此在平時應注意詞匯的積累，理解詞語的含義及其常見的習慣搭配，再聯(lián)系句子所表述的意義和語境，選出正確的答案．

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