英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：


请选择你想看的字典辞典：
单词字典翻译
preposterousness查看　preposterousness　在百度字典中的解释百度英翻中〔查看〕
preposterousness查看　preposterousness　在Google字典中的解释Google英翻中〔查看〕
preposterousness查看　preposterousness　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Sodium - Wikipedia
    Sodium is an alkali metal, being in group 1 of the periodic table Its only stable isotope is 23 Na The free metal does not occur in nature and must be prepared from compounds Sodium is the sixth most abundant element in the Earth's crust and exists in numerous minerals such as feldspars, sodalite, and halite (NaCl)
  • Heavy metals - Wikipedia
    While distinguishing a heavy metal such as tungsten from a lighter metal such as sodium is relatively easy, a few heavy metals, such as zinc, mercury, and lead, have some of the characteristics of lighter metals, and lighter metals, such as beryllium, scandium, and titanium, have some of the characteristics of heavier metals
  • Sodium hydroxide - Wikipedia
    Sodium hydroxide does not attack iron at room temperature, since iron does not have amphoteric properties (i e , it only dissolves in acid, not base) Nevertheless, at high temperatures (e g above 500 °C), iron can react endothermically with sodium hydroxide to form iron (III) oxide, sodium metal, and hydrogen gas [24]
  • Transition metal - Wikipedia
    In chemistry, a transition metal (or transition element) is a chemical element in the d-block of the periodic table (groups 3 to 12), though the elements of group 12 (and less often group 3) are sometimes excluded
  • Metal halides - Wikipedia
    "Ionic" metal halides (predominantly of the alkali and alkali earth metals) tend to have very high melting and boiling points They freely dissolve in water, and some are deliquescent
  • Liquid metal cooled reactor - Wikipedia
    Sodium and NaK (a eutectic sodium-potassium alloy) do not corrode steel to any significant degree and are compatible with many nuclear fuels, allowing for a wide choice of structural materials
  • Properties of metals, metalloids and nonmetals - Wikipedia
    Metalloids, straddling the metal-nonmetal border, are mostly distinct from either, but in a few properties resemble one or the other, as shown in the shading of the metalloid column below and summarized in the small table at the top of this section
  • Alkoxide - Wikipedia
    Sodium methoxide in solution, for example, is commonly used for this purpose, a reaction that is used in the production of biodiesel
  • Flame test - Wikipedia
    The procedure uses different solvents and flames to view the test flame through a cobalt blue glass or didymium glass to filter the interfering light of contaminants such as sodium
  • Reactivity series - Wikipedia
    The most reactive metals, such as sodium, will react with cold water to produce hydrogen and the metal hydroxide: 2 Na (s) + 2 H 2 O (l) →2 NaOH (aq) + H 2 (g)





中文字典-英文字典  2005-2009