What are the full meaning of PD,RD, and AD?

來源: blue5star 於 2010-09-08 22:52:31 [] [舊帖] [給我悄悄話] 閱讀數 : (83 bytes)
回答: 終於綠了，NSC 由 順理成章 於 2010-09-03 21:50:11

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What are the full meaning of PD,RD, and AD?

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