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【单选题】
下列热化学方程式中，正确的是 [ ]A.
甲烷的燃烧热Δ H =- 890.3 kJ·mol -1 ，则甲烷燃烧的热化学方程式可表示为：CH 4 (g)+2O 2 (g)=CO 2 (g)+2H 2 O(g)；Δ H =-890.3 kJ·mol -1
B.
500 ℃、30 MPa下，将0.5 mol N 2 和1.5 mol H 2 置于密闭容器中充分反应生成NH 3 (g)，放热19.3 kJ，其热化学方程式为：N 2 (g)+3H 2 (g) 2NH 3 (g)；Δ H = -38.6 kJ·mol -1
C.
HCl和NaOH反应的中和热Δ H = -57.3 kJ·mol -1 ，则H 2 SO 4 和Ca(OH) 2 反应的中和热△ H =2×（-57.3）kJ·mol -1
D.
在101 kPa时，2g H 2 完全燃烧生成液态水，放出285.8 kJ热量，氢气燃烧的热化学方程式表示为2 H 2 (g)+O 2 (g)=2 H 2 O(l)；Δ H = -571.6 kJ·mol -1
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【简答题】int a, b, s;a = 5;b = 5;s = a / b;则s的值为:______A. 1 B. 2 C. 3 D. 4
【简答题】From the conversation, we know that the gesture “victory” is not allowed in ______ since it’s an insult.
【单选题】#include main() {void f(int a,int b); int a[5]={5,4,3,2,1}; int i,s; f(a[0],a[1]); printf("%d\n",a[1]); } void f(int a,int b) { int t; t=a;a=b;b=t; } 程序运行结果是?
A.
5
B.
4
C.
3
D.
1
【简答题】Either as a greeting gesture or a way of celebrating victory, hugs seem to be everywhere today. US Academy Award winner hug all the way from seat to stage and teammates often enjoy full-bodied man hug...
【简答题】Are you still doing the V for victory sign? It’s out. The latest popular hand gesture（手势）is to curl both of your hands and put them together to make a heart—shape. Known as “hand heart”, many young st...
【判断题】Making a V for victory sign with the back of one's hand toward the audience means something dirty, which is an obscene gesture.
A.
正确
B.
错误
【简答题】Task 2 Read the following passage and choose the best answer to each question. Either as a greeting gesture or a way of celebrating victory, hugs seem to be everywhere today. US Academy Award winner h...
【简答题】Task 1 Either as a greeting gesture or a way of celebrating victory, hugs seem to be everywhere today. US Academy Award winner hug all the way from seat to stage and teammates often enjoy full-bodied ...
【简答题】int a, b, s;a = 5;b = 5;s = a - b;则s的值为:______A. 2 B. 1 C. 0 D. 3
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