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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: . Z( O) X8 B b# x+ d# X
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a& S$ H# ?1 _Nuclear 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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$ s" |# ^6 B _" r3 cClark, 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: ' ~# J$ P) V' O: c, w. u
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Lerner, 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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: ]) F, i" k" u& ecritical mass1 B6 M$ }( ]0 b% b3 }3 {) F3 I
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1. The smallest mass of a fissionable material that will sustain a nuclear chain reaction at a constant level.# M) \4 T& Y4 O k. `; y, \
2. The amount of matter needed to generate sufficient gravitational force to halt the current expansion of the universe% P9 o: r' a: [8 Z* d) U- ?/ O& S
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# k$ G: y% L r0 i[ 本帖最后由 墨涟 于 2008-10-24 15:04 编辑 ] |
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