AI是这样说的：“社会保障信托基金不投资于股票;它们只投资于美国国债，特别是特殊的非上市国债。”

来源: 吸海垂虹于 2025-04-06 22:11:30 [旧帖] [给我悄悄话] 本文已被阅读：次

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