氢气用于烟气的脱氮、脱硫的反应: 4H2 (g)+2NO(g)+SO2 (g) N2 (g)+S(l)+4H2 O(g) ΔH< 0。下列有关说法正确的是 A. 当 v(H2 )=v(H2 O)时,达到平衡 B. 升高温度,化学平衡正向移动 C. 使用高效催化剂可提高 NO的平衡转化率 D. 化衡常数学平表达式为 K= 答案:D【详解】 A. v(H2 )=v(H2 O),没有告诉正逆反应速率,无法判断是否达到平衡状态,故 A错误;B.温度升高后,正反应速率和逆反应速率都增大,由于逆反应速率增大的幅度大于正反应,所以平衡向着逆向移动,故 B错误;C.使用高效催化剂可以增大反应速率,但是不影响化学平衡,无法提高 NO的平Dear Jack,My name is Li Lei. I’m eleven years old. I 1 black eyes and black hair. I often wear blue and grey clothes. I have a sister. 2 name is Li Xue. I have a cat. 3 name is Brave. We live in Shanghai. There 4 three bedrooms in my home. I like sport. I like basketball and table tennis. I like 5 football on TV,too. But I am not very good 6 football.My 7 hobbies(爱好) are playing the piano(钢琴) and swimming. What 8 you?I want to 9 your friend.Please 10 back soon.Yours,Li Lei( ) 1. A. am B. are C. has D. have( ) 2. A. His B. She C. Her D. Hers( ) 3. A. It B. Its C. It’s D. Its’( ) 4. A. has B. have C. is D. are( ) 5. A. looking B. looking at C. seeing D. watching( ) 6. A. at B. in C. on D. for( ) 7. A. the other B. the others C. other D. others( ) 8. A. about B. for C. from D. with( ) 9. A. is B. am C. are D. be( ) 10. A. listen B. write C. speak D. read