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氮及其化合物在工农业生产、生活中有着重要作用。请回答下列问题 (1)上图是N 2 和H 2 反应生成2mol NH 3 过程中能量变化示意图，请计算每生成1 mol NH 3 放出热量为 _____________； (2)在体积为2L的密闭容器中，进行如下化学反应：N 2 (g) +3H 2 (g) 2NH 3 (g) △H<0，得到如下数据 请回答下列问题： ①反应的平衡常数表达式为________； K1的相对大小，K1____(填“>”“=”或“6； ②实验l中以v(H 2 )表示的反应速率为_____________； ③下列各项能作为判断该反应达到化学平衡状态的依据的是____（填序号字母）； A．容器内N 2 、H 2 、NH 3 的物质的量浓度之比为1：3：2 B．v(N 2 ) 正 = 3v(H 2 ) 逆 C．容器内压强保持不变 D．混合气体的密度保持不变 (3)NH 4 Cl溶液呈酸性，这是由于NH 4 + 水解的缘故。则NH 4 Cl在重水(D 2 O)中水解的离子方程式是 __________________
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【判断题】人类食物中的糖主要靠动物性食物供给。
A.
正确
B.
错误
查看完整题目与答案
【单选题】—______? —Well, we can't arrive late for class. [     ]
A.
Can you arrive late at class
B.
What are the rules
C.
What else do you have to do
D.
Did you arrive late at class
查看完整题目与答案
【单选题】患者，男性，30岁。因突然头痛、呕吐，脑膜刺激征阳性入院，初步诊断蛛网膜下腔出血，病因诊断主要依靠
A.
脑脊液检查
B.
CT检查
C.
MRI检查
D.
脑血管造影
E.
脑超声检查
查看完整题目与答案
【单选题】The p o em ___ as We are told at the outset, was“ to justify the way of god to man”, i.e., to advocate submission to the Almighty.
A.
Paradise Lost
B.
Paradise R egained
C.
Samson Agonistes
D.
L a llegro
查看完整题目与答案
【单选题】患者,女性,37岁。每次出门时,总要先向前走三步,再向后退一步,然后才走出门,否则便感到强烈的不安。自感无法控制而来院就医。该患者的症状是:
A.
强迫意向
B.
强迫检查
C.
强追性仪式动作
D.
强迫怀疑
查看完整题目与答案
【单选题】We are glad to inform you t h at the quality of y o ur go o ds tu r ns out to be _____
A.
sat isf ied
B.
satis f ying
C.
satisfaction
D.
satisfactory
查看完整题目与答案
【简答题】This page has the clear i——- of this kind of medicine. We are doing a s——— about tho most popular sport among the students. Our school has high s——— of teaching. Tom and I are in the school class, but...
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【简答题】人类食物中的糖主要是
查看完整题目与答案
【单选题】患者，男性，30岁，因突然头痛、呕吐，脑膜刺激征阳性入院，初步诊断蛛网膜下隙出血，病因诊断主要依靠
A.
脑脊液检查
B.
CT检查
C.
MRI检查
D.
脑血管造影
E.
脑超声检查
查看完整题目与答案
【单选题】The figure (Image from the web) shows two identical copper blocks of mass m =1.5 kg: block L at temperature T iL = 60°C and block R at temperature T iR = 20°C. The blocks are in a thermally insulated ...
A.
Δ S L = 35.86J/K, Δ S R = 38.23J/K , Δ S = 2.37J/K
B.
Δ S L = 35.86J/K, Δ S R = -38.23J/K , Δ S = 2.37J/K
C.
Δ S L = -35.86J/K, Δ S R = 38.23J/K , Δ S = -2.37J/K
D.
Δ S L = -35.86J/K, Δ S R = 38.23J/K , Δ S = 2.37J/K
查看完整题目与答案
相关题目：
【判断题】人类食物中的糖主要靠动物性食物供给。
A.
正确
B.
错误
查看完整题目与答案
【单选题】—______? —Well, we can't arrive late for class. [     ]
A.
Can you arrive late at class
B.
What are the rules
C.
What else do you have to do
D.
Did you arrive late at class
查看完整题目与答案
【单选题】患者，男性，30岁。因突然头痛、呕吐，脑膜刺激征阳性入院，初步诊断蛛网膜下腔出血，病因诊断主要依靠
A.
脑脊液检查
B.
CT检查
C.
MRI检查
D.
脑血管造影
E.
脑超声检查
查看完整题目与答案
【单选题】The p o em ___ as We are told at the outset, was“ to justify the way of god to man”, i.e., to advocate submission to the Almighty.
A.
Paradise Lost
B.
Paradise R egained
C.
Samson Agonistes
D.
L a llegro
查看完整题目与答案
【单选题】患者,女性,37岁。每次出门时,总要先向前走三步,再向后退一步,然后才走出门,否则便感到强烈的不安。自感无法控制而来院就医。该患者的症状是:
A.
强迫意向
B.
强迫检查
C.
强追性仪式动作
D.
强迫怀疑
查看完整题目与答案
【单选题】We are glad to inform you t h at the quality of y o ur go o ds tu r ns out to be _____
A.
sat isf ied
B.
satis f ying
C.
satisfaction
D.
satisfactory
查看完整题目与答案
【简答题】This page has the clear i——- of this kind of medicine. We are doing a s——— about tho most popular sport among the students. Our school has high s——— of teaching. Tom and I are in the school class, but...
查看完整题目与答案
【简答题】人类食物中的糖主要是
查看完整题目与答案
【单选题】患者，男性，30岁，因突然头痛、呕吐，脑膜刺激征阳性入院，初步诊断蛛网膜下隙出血，病因诊断主要依靠
A.
脑脊液检查
B.
CT检查
C.
MRI检查
D.
脑血管造影
E.
脑超声检查
查看完整题目与答案
【单选题】The figure (Image from the web) shows two identical copper blocks of mass m =1.5 kg: block L at temperature T iL = 60°C and block R at temperature T iR = 20°C. The blocks are in a thermally insulated ...
A.
Δ S L = 35.86J/K, Δ S R = 38.23J/K , Δ S = 2.37J/K
B.
Δ S L = 35.86J/K, Δ S R = -38.23J/K , Δ S = 2.37J/K
C.
Δ S L = -35.86J/K, Δ S R = 38.23J/K , Δ S = -2.37J/K
D.
Δ S L = -35.86J/K, Δ S R = 38.23J/K , Δ S = 2.37J/K
查看完整题目与答案
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