碱金属原子的价原子具有两种能态.The valence atom of an alkali - metal atom has two states.所有的碱金属都在闭合壳层之外有一单个S电子.All the alkali metals have a single s - electron outside a closed shell.当碱金属光谱显示出不容怀疑的双线结构时,是令人惊奇的.It was surprising when th...
The causes of tarnishing gold and silver - plated connectors were studied respectively.分别探讨了接插件镀金和镀银层变色的原因.Bright tin electrodeposits on copper wire are susceptible to tarnishing.铜线材经光亮镀锡后易产生腐蚀变色.Do they not realize thei...
介绍一种适用于各类氧化还原反应方程式配平的方法——新代数法.A new algebraic method of balancing redox reaction formulas is introduced.最后, 本文给出了歧化反应方程式的简捷配平方法.Finally, the author put for - ward the forthright method of balancing equations.本文主要介绍小升阻比载人...
The epistle deals therefore with the sovereign and universal principles.这封书信讲到了至尊的,最大的原则.The peace treaty will lay the foundations for a loose confederation of sovereign states.该和平条约将为主权国家形成松散的同盟关系奠定基础。In March 1889, she...