研究成果发表于《自然》杂志 钷“配位复合物”的合成钷（Pm），是一种具有放射性的镧系稀土元素之一，在自然界的含量非常稀少，不足 1 公斤 ...

钷“配位复合物”的合成 钷（Pm），是一种具有放射性的镧系稀土元素之一，在自然界的含量非常稀少，不足1公斤。钷的性质极不稳定且具有放射性 ...

JERUSALEM, Aug 25 (Reuters) - Israeli Prime Minister Benjamin Netanyahu said on Sunday Israel would take all measures necessary to defend itself, after the Iranian-backed Hezbollah launched ...

Jornay PM (methylphenidate) is a brand-name drug that’s prescribed for attention deficit hyperactivity disorder (ADHD) in adults and certain children. Jornay PM comes as an ER capsule that’s ...

Modi's visit is first in modern Ukrainian history Indian PM met Russia's Putin in Moscow in July Wartime Kyiv trying to build ties with Global South Kyiv sees visit of Indian PM as 'extremely ...

在标准状况下，序号绿色者为气体；序号蓝色者为液体；序号黑色者为固体；序号灰色者为未知相态。 More information 名称, 条目 ... 名称 条目 符号 稳定性 周期 性质 质子数 中子数 质量数 电子 ...

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The Price to Earnings (P/E) ratio, a key valuation measure, is calculated by dividing the stock's most recent closing price by the sum of the diluted earnings per share from continuing operations ...

Philip Morris International, Inc. is a holding company, which engages in the business of delivering a smoke-free future and evolving a portfolio for the long term to include products outside of ...