孙维是当时清华认定的唯一能接触到铊的朱令的同学，而且孙维的毕业证书被清华扣留了好几年，延迟发给她。

来源: Biao9919 于 2023-12-26 19:20:46 [旧帖] [给我悄悄话] 本文已被阅读：次

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