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【语篇导读】本文是一份广告,广告中主要介绍了普林斯顿大学的一些基本情况。21.C.根据第一段最后一句中的 Princeton is distinctive among research universities in its commitment to undergraduate teaching可知C选项的意思与之相符。故选C22.C.根据文章 Library部分中的 The library's' collections include more than8 million books and impressive rare books, prints and other materials that require special handling. The library's extensive electronic resources include databases and journals. images and digital maps.可知,C选项的意思与之相符故选C23.A.根据最后一部分中的: Our aid program is designed to encourage all qualified students-regardless of financial circumstances-to consider applying for admission to Princeton. Any family who feels they may need help to pay for Princeton education is welcome to apply for aid.可知,不论经济状况如何凡需资助从而继续学业的该校学生均可申请经济援助。故选A