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释义
Encyclopedia
理学
放射性元素
释
meitnerium
人工放射性元素,元素符号Mt,原子序数109,半衰期最长的同位素的质量数278。属周期系Ⅷ族。为纪念核物理学家和放射化学家L.迈特纳[注]而命名。曾被称为109号元素(unnilennium),符号Une。
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singular cohomology group
singular cohomology ring
singular collineation
singular complex
singular component
singular configuration
singular congruence
singular conic
singular continued fraction
singular control
singular coordinate
singular correlation
singular correspondence
singular critical lattice
singular cube
singular curve
singular cycle
singular direction
singular distribution
singular divisor
singular element
singular element of a Lie algebra
singular elliptic function
singular endomorphism
singular endpoint
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