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：

hf    
n. high frequency（高频）的简写

high frequency（高频）的简写

Hf
n 1: a grey tetravalent metallic element that resembles
zirconium chemically and is found in zirconium minerals;
used in filaments for its ready emission of electrons [synonym:
{hafnium}, {Hf}, {atomic number 72}]
2: 3 to 30 megahertz [synonym: {high frequency}, {HF}]

Hydrofluoric \Hy`dro*flu*or"ic\, a. [Hydro-, 2 fluoric.]
(Chem.)
Pertaining to, or containing, hydrogen and fluorine;
fluohydric; as, hydrofluoric acid.
[1913 Webster]

{Hydrofluoric acid} (Chem.), a colorless, mobile, volatile
liquid, {HF}, very corrosive in its action, and having a
strong, pungent, suffocating odor. It is produced by the
action of sulphuric acid on fluorite, and is usually
collected as a solution in water. It attacks all
silicates, as glass or porcelain, is the agent employed in
etching glass, and is preserved only in vessels of
platinum, lead, caoutchouc, or gutta-percha.
[1913 Webster]


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


  • HF Foods Group – Specialty Food is our Specialty!
    HF Foods Group Inc , headquartered in Las Vegas, Nevada, is a leading marketer and distributor of fresh produce, frozen and dry food, and non-food products to specialty and international restaurants, as well as other foodservice customers, throughout the United States
  • Hydrogen fluoride - Wikipedia
    HF is diatomic in the gas phase As a liquid, HF forms relatively strong hydrogen bonds, hence its relatively high boiling point Solid HF consists of zigzag chains of HF molecules
  • HF Sinclair Corporation | Home
    Careers Accessibility EEO Site Map Privacy Cookies Human Rights and Modern Slavery Policy Modern Slavery Statement CA Transparency Disclosure Terms of Use © Copyright 2022 HF Sinclair Corporation Powered By Q4 Inc 5 180 2 5
  • Hydrogen Fluoride | Chemical Emergencies | CDC
    Background Hydrogen fluoride is a chemical compound (made up of two or more elements) that has the element fluorine It can be a colorless gas or a fuming liquid, which means it creates gas vapors It can also be dissolved in water When hydrogen fluoride is dissolved in water, it may be called hydrofluoric acid Hydrogen fluoride can be made when other compounds with fluoride, such as
  • HF Stride – Hands-Free Ergonomic Barefoot Shoes - Hike Footwear
    Hands-Off Barefoot Shoes That Move With You Say goodbye to bending down and struggling with tight shoes HF Stride is the first-ever barefoot shoe designed with
  • HF Foods Group Inc. (HFFG) - Yahoo Finance
    Find the latest HF Foods Group Inc (HFFG) stock quote, history, news and other vital information to help you with your stock trading and investing
  • HYDROGEN FLUORIDE† - Occupational Safety and Health Administration
    * All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details
  • What is HF? - American Association of Heart Failure Nurses - AAHFN
    Heart Failure (HF) is a very common problem in the United States 1 in 5 Americans will develop heart failure in their lifetime 1 About 915,000 new patients are diagnosed with heart failure each year 1 It is the leading cause for adults over the age of 65 to be admitted to the hospital
  • Hydrofluoric Acid (HF) | Division of Research Safety | Illinois
    Overview of Hazards Hydrofluoric acid (HF) is an extremely corrosive liquid and vapor with a pungent, irritating odor HF solutions are extremely hazardous and can cause serious health effects by any route of exposure Unlike other mineral acids, they pose health hazards in addition to acid burns
  • Information on Hydrofluoric Acid - Stanford University
    Hydrofluoric acid, a solution of hydrogen fluoride gas (HF) in water, is one of the most corrosive and dangerous chemicals encountered in the laboratory Exposure to HF can cause severe tissue damage and even death





中文字典-英文字典  2005-2009