【单选题】已知25 ℃、101 kPa下,下列反应C(石墨) + O 2 (g) === CO 2 (g) ,燃烧1 mol C(石墨)放热393.51 kJ。C(金刚石) + O 2 (g) === CO 2 (g),燃烧1 mol C(金刚石)放热395.41 kJ。可以得出的结论是 [ ]
B.
1 mol石墨所具有的能量比1 mol金刚石低
【单选题】2001 年 6 月 15 日,由中国、俄罗斯、哈萨克斯坦、吉尔吉斯斯坦、塔吉克斯坦和乌兹别克斯坦组成的上海合作组织在上海成立,该组织不属于
【简答题】关于茶馆的记载,最早见于唐代的( 《 》 )
【单选题】Given: String[] elements = { "for", "tea", "too" }; String first = (elements.length > 0) ? elements[0] : null; What is the result?()
B.
An exception is thrown at runtime.
C.
The variable first is set to null.
D.
The variable first is set to elements[0].
【单选题】String[] elements = { “for”, “tea”, “too” }; String first = (elements.length > 0)? elements[0] null; What is the result?()
B.
An exception is thrown at runtime.
C.
The variable first is set to null.
D.
The variable first is set to elements[0].
【单选题】已知25 ℃、101 kPa下,下列反应 C(石墨) + O 2 (g) === CO 2 (g) ,燃烧1 mol C(石墨)放热393.51 kJ。 C(金刚石) + O 2 (g) === CO 2 (g),燃烧1 mol C(金刚石)放热395.41 kJ。 可以得出的正确结论是( )
【多选题】which elements belong to micro-elements?
【简答题】A metallic consisting of metal elements and other elements is named as______.