单词:variable-number-node element
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北京奥运28大项 参与,竞争,分享,进步 Equestrian 马术 Jumping 障碍赛 英文原文 A jumping competition is one in which the combination of horse and competitor is tested under various conditions over a course of obstacles. It is a test intended to demon
Science and Technolgy. 科技。 Modern alchemy. 现代炼金术。 Turning a line. 进入新的一行。 The race to extend the periodic table continues. 扩展元素周期表的比赛仍在继续。 ONE of the first inklings that chemistry has an u
As It Is - Remember Your Chemistry Classes? An international team of researchers recently reported creation of a new element that is 40 percent heavier than lead. The researchers successfully developed what they are calling Element Number 117 at a la
The structure of atoms and the significance of protons will come in a following chapter, so for the moment all that is necessary is to appreciate the organizing principle: hydrogen has just one proton, and so it has an atomic number of one and comes