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发表于 2008-10-22 14:14 | 显示全部楼层 |阅读模式
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Nuclear weapons:
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Weapons of Mass Destruction. (2003). In Harvey Kushner (Ed.), Encyclopedia of Terrorism, Vol. 1. (404-406). Thousand Oaks: Sage Reference. Retrieved October 22, 2008,  from Gale Virtual Reference Library via Gale:
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6 H) Y3 ~/ [4 R0 [; Q: ~/ vNuclear Weapons. (2006). Encyclopedia of Modern Europe: Europe Since 1914: Encyclopedia of the Age of War and Reconstruction, Vol. 4. (1891-1898). Retrieved October 22, 2008,  from Gale Virtual Reference Library via Gale: ) Y4 j: q/ F1 ^; n; y1 V
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Clark, Roger. (2005). Nuclear Weapons. In Dinah Shelton (Ed.), Encyclopedia of Genocide and Crimes Against Humanity, Vol. 2. (754-761). Detroit: Macmillan Reference USA. Retrieved October 22, 2008,  from Gale Virtual Reference Library via Gale:
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7 V: ?  C/ [) Q- J: k% J% V. mLerner, K. Lee, Gilman, Larry, & Haycock, Dean Allen. (2004). Nuclear Weapons. In K. Lee Lerner & Brenda Lerner (Eds.), Gale Encyclopedia of Science, Vol. 4. (3rd ed., 2816-2821). Detroit: Gale. Retrieved October 22, 2008,  from Gale Virtual Reference Library via Gale: / Y' Z( `# K: ~1 k1 c3 g
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critical mass- E' W$ ?$ ?- `$ G/ z9 G
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1. The smallest mass of a fissionable material that will sustain a nuclear chain reaction at a constant level.
# M7 K6 d7 ^/ v) l; {; O2. The amount of matter needed to generate sufficient gravitational force to halt the current expansion of the universe: e. a! C. e4 B5 _% [0 B/ }
<http://www.thefreedictionary.com/critical+mass>  E* d4 Y8 O' r0 D1 ^

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' F" T0 b  m& u& D[ 本帖最后由 墨涟 于 2008-10-24 15:04 编辑 ]
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