题目

高铁电池是一种新型可充电电池，与普通高能电池相比，该电池能长时间保持稳定的放电电压。高铁电池的总反应为         (    )  3Zn+2K2FeO4+8H2O            3Zn(OH)2+2Fe(OH)3+4KOH 下列叙述不正确的是 A．放电时负极反应为：Zn-2e-+2OH-= Zn(OH)2 B．充电时阳极反应为：Fe(OH)3 -3e-+ 5OH-= FeO42-+ 4H2O C．放电时每转移3 mol电子，正极有1mol K2FeO4被氧化 D．放电时正极附近溶液的碱性增强完型填空 （共20小题；每小题1分，满分20分） A Fool’s Day falls on 1st of April. People _31_forget the significance （意义） of the day. In March 1980, I was 32at Durham University with seven other Chinese students. I had 33  to go to another university after graduation and had 34         application (申请)  forms to several 35  . Every morning I arrived at the porter’s office (传达室) and waited my fate. But no 36  came. On April 1st, as I was eating my 37 , Huang came in , with a toothbrush(牙刷) 38  in his hand.  39 fearing that he might forget the important news , he passed me the 40 . “Morning , Wu,” he said , “I saw Mr. G this morning. He told me that a letter had arrived in his office for you from Manchester University, and asked you to go and get it 41 possible.” I jumped with 42 . I even didn’t 43 my breakfast and rushed to Mr. G’s office but he wasn’t  44  . I then went to the secretary’s room and  45 everything to her. She opened Mr. G’s room. I looked at everything. There didn’t seem to be a letter for me. “If he had asked you to pick it up from here,” said the secretary , “ he would have put it in  46 or simply left it to me.” Greatly 47 , I walked out of the room and 48 the secretary lock it. 49 the secretary’s eyes 50  . “Sorry,” she said. “It’s April Fool’s Day!” 1.A sometimes        B. never            C. always       D. seldom 2. A．staying B．working C．visiting D．studying 3. A．continued B．planned C．went D．remembered 4. A．returned B．taken C．brought D．sent 5. A．people B．colleges C．cities D．offices 6. A．application B．report C．reply D．chance 7. A．dinner B．lunch C．supper D．breakfast 8. A．still B．even C．yet D．already 9. A．Because of B．As if C．After D．While 10. A．message B．sign C．letter D．notice 11. A．if B．as soon as C．when D．as fast as 12. A．the news B．the letter C．joy D．luck 13. A．take B．finish C．eat D．have 14. A．anywhere B．in C．at D．away 15. A．asked B．tells C．explained D．answered 16. A．the office B．his desk C．the room D．an obvious（明显的） place 17. A．disappoint B．disappointed C．disappointing D．disappointment 18. A．watched B．noticed C．saw D．got 19. A．Quickly B．Strangely C．Finally D．Suddenly 20. A．closed B．opened C．brightened D．darkened