送交者: steven 于 2013-03-13, 15:42:24:

回答: x射线剂量大对人体可能有害有异议么？不然有哪些指导剂量干什么？ 由 whatistruth 于 2013-03-13, 15:31:16:

• 板凳带着呢。谁要开课，我洗耳恭听。 (无内容) - whatistruth (0 bytes) 2013-03-13, 15:54:12 (710254)
  • Never heard of Lois Lane? (无内容) - steven (0 bytes) 2013-03-13, 16:07:14 (710259)
    • man! give a hint next time. : ( (无内容) - whatistruth (0 bytes) 2013-03-13, 18:32:06 (710300)
    • Lois Lane - ASH (104 bytes) 2013-03-13, 16:17:41 (710261)
      • in fact, she's his wife. - steven (333 bytes) 2013-03-13, 17:15:38 (710271)

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