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【简答题】
What should you do before you leave the reading room?
拍照语音搜题，微信中搜索"皮皮学"使用
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【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...
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【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
查看完整题目与答案
【简答题】Working-class families in the United States are usually nuclear, and many studies indicate that working-class couples marry for love, not for money. Upper-class couples may marry for love, but their c...
查看完整题目与答案
【单选题】298K时,反应N2(g)+3H2(g)-→2NH+922k/mo若温度升高,则( )
A.
正反应速率增大,逆反应速率减小
B.
正、逆反应速率均增
C.
正反应速率减小,逆反应速率增大
D.
正、逆反应速率均减小
查看完整题目与答案
【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( )
A.
平衡右移，氨的产量增加
B.
平衡状态不变
C.
平衡左移，氨的产量减少
D.
正反应速率加快
查看完整题目与答案
【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
查看完整题目与答案
【单选题】在298K时反应N 2 (g)+3H 2 (g)=2NH 3 (g)， ＜0，则标准状态下该反应：
A.
任何温度下均自发进行；    
B.
任何温度下均不能自发进行；
C.
高温自发；
D.
低温自发。
查看完整题目与答案
【单选题】班级活动的功能主要有()
A.
满足交往需求的功能,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.
满足交往需求的功能,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.
满足交往需求的功能.学习发展功能.个性发展功能.班集体建设功能.教育评估
D.
足交拄需求的功能.学习发展功能.个性发展功能.班集体建设功能.班级评比
查看完整题目与答案
【单选题】班级活动的功能主要有()
A.
足交往需求的功能,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.
足交往需求的功能,增进相互了解功能,个性发展功能,班集体建设功能、班主任
C.
提升功能
D.
满足交往需求的功能、学习发展功能、个性发展功能、班集体建设功能、教育评估
E.
F.
满足交拄需求的功能、学习发展功能、个性发展功能、班集体建设功能、班级评比
查看完整题目与答案
【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...
A.
William Faulkner
B.
F. Scott Fitzgerald
C.
Ernest Hemingway
D.
John Steinbeck
查看完整题目与答案
相关题目：
【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...
查看完整题目与答案
【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
查看完整题目与答案
【简答题】Working-class families in the United States are usually nuclear, and many studies indicate that working-class couples marry for love, not for money. Upper-class couples may marry for love, but their c...
查看完整题目与答案
【单选题】298K时,反应N2(g)+3H2(g)-→2NH+922k/mo若温度升高,则( )
A.
正反应速率增大,逆反应速率减小
B.
正、逆反应速率均增
C.
正反应速率减小,逆反应速率增大
D.
正、逆反应速率均减小
查看完整题目与答案
【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( )
A.
平衡右移，氨的产量增加
B.
平衡状态不变
C.
平衡左移，氨的产量减少
D.
正反应速率加快
查看完整题目与答案
【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
查看完整题目与答案
【单选题】在298K时反应N 2 (g)+3H 2 (g)=2NH 3 (g)， ＜0，则标准状态下该反应：
A.
任何温度下均自发进行；    
B.
任何温度下均不能自发进行；
C.
高温自发；
D.
低温自发。
查看完整题目与答案
【单选题】班级活动的功能主要有()
A.
满足交往需求的功能,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.
满足交往需求的功能,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.
满足交往需求的功能.学习发展功能.个性发展功能.班集体建设功能.教育评估
D.
足交拄需求的功能.学习发展功能.个性发展功能.班集体建设功能.班级评比
查看完整题目与答案
【单选题】班级活动的功能主要有()
A.
足交往需求的功能,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.
足交往需求的功能,增进相互了解功能,个性发展功能,班集体建设功能、班主任
C.
提升功能
D.
满足交往需求的功能、学习发展功能、个性发展功能、班集体建设功能、教育评估
E.
F.
满足交拄需求的功能、学习发展功能、个性发展功能、班集体建设功能、班级评比
查看完整题目与答案
【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...
A.
William Faulkner
B.
F. Scott Fitzgerald
C.
Ernest Hemingway
D.
John Steinbeck
查看完整题目与答案