【简答题】反应N 2 (g)+3H 2 (g)====2NH 3 (g)在298K时的 =-92.88H/mol,求此反应在398K时的 。已知: C p,m (N 2 ,g)=(26.98+5.912×10 -3 T-3.376×10 -7 T 2 )J/(K·mol) C p,m (H 2 ,g)=(29.07-0.837×10 -3 T+20.12×10 -7 T 2 )J/(K·mol) C p,m...
【判断题】班级管理的主要功能在于实现教学目标,提高学习效率,以利于更有效地开展实施教学活动。()
【单选题】Though it is merely 1 to 3 percent of the population, the upper class possesses at least 25 percent of the nation s wealth. This has two segments; upper-upper and lower-upper. Basically, the upper-upp...
A.
the upper class owns at least a quarter of the country' s wealth
B.
the 'old rich' enjoy higher prestige than the 'new rich'
C.
the 'old rich' isolate themselves and lead a lonely life
D.
the upper-upper class is of aristocratic origin
【单选题】298K时,反应N2(g)+3H2(g)-→2NH+922k/mo若温度升高,则( )
【单选题】在 298K时反应N 2 (g) + 3H 2 (g) ≒ 2NH 3 (g)正反应是放热反应。在密闭容器中该反应达到平衡时,若加入稀有气体,估计会出现( )
【单选题】Though it is mere 1 to 3 percent of the population, the upper class possesses at least 25 percent of the nation's wealth. This class has two segments: upper-upper and lower-upper. Basically, the upper...
A.
the upper-upper class is of aristocratic origin
B.
the 'old rich' enjoy higher prestige than the 'new rich'
C.
the 'old rich' isolate themselves and lead a lonely life
D.
the upper class owns at least a quarter of the country's wealth
【单选题】在298K时,反应N 2 (g)+3H 2 (g)=2NH 3 (g),△ r H θ m <0则标准状态下该反应()。
【单选题】班级活动的功能主要有()
A.
满往需求的功能,学习发展功能,个性发展功能,班集体建设功能.班主任专业提升功能
B.
满往需求的功能,增进相互了解功能,个性发展功能,班集体建设功能.班主任提升功能
C.
满往需求的功能.学习发展功能.个性发展功能.班集体建设功能.教育评估
D.
拄需求的功能.学习发展功能.个性发展功能.班集体建设功能.班级评比
【单选题】班级活动的功能主要有()
A.
往需求的功能,学习发展功能,个性发展功能,班集体建设功能、班主任专业提升功能
B.
往需求的功能,增进相互了解功能,个性发展功能,班集体建设功能、班主任
D.
满往需求的功能、学习发展功能、个性发展功能、班集体建设功能、教育评估
F.
满拄需求的功能、学习发展功能、个性发展功能、班集体建设功能、班级评比
【单选题】________ wrote about the society in the South by inventing families: the old decaying upper class; the rising, ambitious, unscrupulous class of the "poor white"; and the Negroes who labored for both o...