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钷
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钷【医】 florentium Il illinium Pm 钷(1)鉕pǒ(2)稀土族的一种金属元素,自然界中不存在其稳定的同位素,发现的钷为放射性形式,是铀的裂变产物,也可从中子照射制得,半衰期2.64年。表现出其它稀土元素的化学性质 [promethium]――元素符号Pm
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refusal of justice
refusal of recognition
refusal of registration
refusal of visa
refusal reason
refusal to accept
refusal to accept office
refusal to pay
refusal to start
refuse
refuse bail
refuse disposal
refuse incinerator
refuse matter
refusenik
refuser
refuse to pay tax
refusing inspection of books
refusion
refutable
refutable formula
refutal
refutation
refutation graph
refutation process
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更新时间:2026/5/3 3:55:34