首頁英語詞典hydrogenhydrogen考試真題

hydrogen

英 ['ha?dr?d?(?)n] 美['ha?dr?d??n]
  • n. [化學(xué)] 氫

考試真題


Most hydrogen and oxygen atoms in water are stable, but traces of both elements are also present as heavier isotopes.

2015年12月六級(jí)真題(第二套)聽力 Section C