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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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http://nuclearweaponarchive.org/Nwfaq/Nfaq0.html
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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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/ {( n, N7 G- B/ R% ?* c( PNuclear 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:
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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: 6 W7 r; x+ l$ X& o
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5 M7 b  s2 v$ `6 b$ y/ Y& dLerner, 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:
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critical mass" b4 S% s  K! i) o$ i; v( x
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2 z3 K- k& R3 h1. The smallest mass of a fissionable material that will sustain a nuclear chain reaction at a constant level.) B- g6 c5 R. Z  Z
2. The amount of matter needed to generate sufficient gravitational force to halt the current expansion of the universe4 j: v$ Q: i, `8 b
<http://www.thefreedictionary.com/critical+mass>
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[ 本帖最后由 墨涟 于 2008-10-24 15:04 编辑 ]
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