<optgroup id="cbt7g"><del id="cbt7g"></del></optgroup>

      <object id="cbt7g"></object>

      新東方國際游學

      新東方網>長春新東方學校>國內考試>六級>正文

      2019年12月大學英語六級閱讀晨讀美文:Hydrogen and Industries

      2019-07-25 09:36

      來源:新東方在線

      作者:

        Hydrogen and Industries

        Hydrogen, the lightest and simplest of the elements, has several properties that make it valuable for many industries. It releases more heat per unit of weight than any other fuel. In rocket engines, tons of hydrogen and oxygen are burned, and hydrogen is used with oxygen for welding torches that produce temperatures as high as 4, 000 degrees F and can be used in cutting steel. Fuel cells to generate electricity operate on hydrogen and oxygen. Hydrogen also serves to prevent metals from tarnishing during heat treatments by removing the oxygen from them. Although it would be difficult to remove the oxygen by itself, hydrogen readily combines with oxygen to form water, which can be heated to steam and easily removed. Hydrogen is also useful in the food industry for a process know as hydrogenation. Products such as margarine and cooking oils are changed from liquids to semisolids by adding hydrogen to their molecules. Soap manufacturers also use hydrogen for this purpose. Hydrogen is also one of the coolest refrigerants. It does not become a liquid until it reaches temperatures of -425 degrees F. Pure hydrogen gas is used in large electric generators to cool the coils. In addition, in the chemical industry, hydrogen is used to produce ammonia, gasoline, methyl alcohol, and many other important products.

             以上就是本文的全部內容,更多精彩請隨時關注新東方長春學校官網。


      相關推薦

      六級資訊

      四六級課程導航

      六級課程表

      六級內容咨詢

      新東方長春學校官方微信:新東方長春學校 (微信號:ccxdfcn

      最新考試資訊、考試政策解讀、真題解析,請掃一掃二維碼,關注我們的官方微信!

      相關推薦

      • 中學輔導
      • 大學輔導
      • 出國輔導
      • 熱門活動

      版權及免責聲明

      凡本網注明"稿件來源:新東方"的所有文字、圖片和音視頻稿件,版權均屬新東方教育科技集團(含本網和新東方網) 所有,任何媒體、網站或個人未經本網協議授權不得轉載、鏈接、轉貼或以其他任何方式復制、發表。已經本網協議授權的媒體、網站,在下載使用時必須注明"稿件來源:新東方",違者本網將依法追究法律責任。

      本網未注明"稿件來源:新東方"的文/圖等稿件均為轉載稿,本網轉載僅基于傳遞更多信息之目的,并不意味著贊同轉載稿的觀點或證實其內容的真實性。如其他媒體、網站或個人從本網下載使用,必須保留本網注明的"稿件來源",并自負版權等法律責任。如擅自篡改為"稿件來源:新東方",本網將依法追究法律責任。

      如本網轉載稿涉及版權等問題,請作者見稿后在兩周內速來電與新東方網聯系,電話:010-60908555。

      靠谱网络彩票平台代理