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Nuclear weapons:/ V& c( W" ]- j, G
http://nuclearweaponarchive.org/Nwfaq/Nfaq0.html
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9 ?0 q6 N) y( VWeapons 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: ' k' I- e! [9 S& z
<http://find.galegroup.com/gvrl/i ... 925&version=1.0>
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/ c3 r9 Q; _9 T. z2 k0 k2 h% n% fNuclear 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: : I. I" f3 R# ]: J; {. v
<http://find.galegroup.com/gvrl/i ... 925&version=1.0>7 _5 h% V7 g1 \( z
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; L; A. N& O9 B; J1 D% b, Z. K/ fClark, 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: " `# {- }1 |" k; ]& L- k8 i
<http://find.galegroup.com/gvrl/i ... 925&version=1.0>
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: i, L5 L* { D. c9 }) W) OLerner, 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: % G9 _/ v: m; k. d" i
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5 V1 t( }9 z2 f) { d4 `! dcritical mass. X. I3 H4 k4 Y
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1. The smallest mass of a fissionable material that will sustain a nuclear chain reaction at a constant level.
4 P% K+ w1 J- m' ?2. The amount of matter needed to generate sufficient gravitational force to halt the current expansion of the universe. e* V; b# h% N$ G3 e2 S% t
<http://www.thefreedictionary.com/critical+mass>
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6 V5 |4 v" ~: ]/ ^: o. {$ F& a[ 本帖最后由 墨涟 于 2008-10-24 15:04 编辑 ] |
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