题型：问答题 简答题 下列电离方程式，不正确的是A．KOH==K++OH-B．CH3COOH==CH3COO- + H+C．NH3·H2ONH4++OH-D．Na2CO3 ="=" 2Na++CO32- 查看答案
题型：问答题 简答题 完形填空。 After graduation from college, I started to sell. Soon I discovered that the 1 expression I had been wearing since childhood meant sure 2 . I knew it wasn't going to be easy to 3 that expression on my face left by so many years of hardship. It 4 a complete change in my view on life. Here is the 5 I tried. Each morning during a fifteen-minute bath, I 6 to cultivate (培养) a big, happy smile. I found out, 7 , that it couldn't be a forced smile 8 just for the purpose of putting dollars in my 9 . It had to be an honest-to-goodness smile from down deep 10 , an outward expression of happiness from within! Let's see 11 starting off with a good fifteen-minute workout of the smile muscles 12 me during the day. Before entering an office I 14 think of the many things I had to be 15 for, work up a big smile and then enter. Seldom did it fail to get the same smile 15 from the person I met. I also found that it 16 people when I passed them on the street to give them a 17 smile. Give every living soul you meet the best smile you have 18 smiled in your life, and see how much better you 19 and look. It's one of the best ways I know to 20 worrying, and start living. When I began doing this,I found I became more welcome everywhere. ( )1. A. happy ( )2. A. success ( )3. A. wear ( )4. A. made up ( )5. A. method ( )6. A. determined ( )7. A. therefore ( )8. A. introduced ( )9. A. opinion ( )10. A. outside ( )11. A. when ( )12. A. helped ( )13. A. could ( )14. A. ready ( )15. A. in general ( )16. A. greeted ( )17. A. cheerful ( )18. A. never ( )19. A. prove ( )20. A. keep B. worried B. friendship B. show B. brought in B. example B. hurried B. however B. developed B. honor B. upward B. how B. upset B. might B. eager B. in public B. pleased B. forced B. just B. appear B. stop C. curious C. failure C. change C. turned over C. idea C. failed C. instead C. discovered C. bill C. inside C. whether C. satisfied C. should C. thankful C. in return C. puzzled C. strange C. already C. feel C. hate D. surprised D. wealth D. see D. called for D. thought D. pretended D. otherwise D. 1eft D. pocket D. forward D. why D. disappointed D. would D. famous D. in advance D. welcomed D. bitter D. ever D. remain D. protect 查看答案
NH4++OH-