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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:, L- C9 b8 ]9 M/ M6 f5 @# g# l$ K
http://nuclearweaponarchive.org/Nwfaq/Nfaq0.html
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2 y8 l8 J% n. [6 O$ MWeapons 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: 5 o4 `# e( O% y% v
<http://find.galegroup.com/gvrl/i ... 925&version=1.0>
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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:
# G! U% ?8 c8 \0 w8 o# P<http://find.galegroup.com/gvrl/i ... 925&version=1.0># Y- b1 D. O) j7 @# r4 \

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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: ! _5 A7 \/ S- P* j1 |! X
<http://find.galegroup.com/gvrl/i ... 925&version=1.0>
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. v# Y) t. B4 R" }" X2 lLerner, 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: 1 S) C( Q8 V' Y1 C7 A0 N
<http://find.galegroup.com/gvrl/i ... 925&version=1.0>( w/ W& z0 ]4 d: p( ]3 P5 F0 P- A( o
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critical mass% s1 B; {0 F2 z$ r; u
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1. The smallest mass of a fissionable material that will sustain a nuclear chain reaction at a constant level.
+ U2 U6 t- x  O2. The amount of matter needed to generate sufficient gravitational force to halt the current expansion of the universe
5 A6 S; `; S2 v1 ]<http://www.thefreedictionary.com/critical+mass>) ]) m% z; `" H" q
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* V( a5 Z' k* U; i0 G6 M1 X[ 本帖最后由 墨涟 于 2008-10-24 15:04 编辑 ]
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