25℃时,向20.00mLNaOH溶液中逐滴加入0.20mo1·L-l的CH3C

题型:选择题

问题:

25℃时,向20.00mLNaOH溶液中逐滴加入0.20mo1·L-l的CH3COOH溶液得到如图曲线。下列说法正确的是

A.水电离出的氢离子浓度:a>b

B.c点时恰好中和

C.在d~e之间存在如下关系:C(Na)>c(CH3COO)>c(H)>c(OH)

D.e点时溶液中溶质是CH3COONa和CH3COOH

考点:弱电解质电离的影响因素弱电解质的电离度弱电解质的电离
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第三节:.完形填空(共20小题;每小题1.5分,满分30分)

People associate colours with different things and feelings. Red, for example, is the colour of fire, heat, blood and life. People say red is an   21   and active colour. They associate red with a strong feeling like   22  . Red is used for signs of   23  , such as STOP signs and fire engines. Orange is the bright, warm colour of    24    in autumn. People say orange is a   25   colour. They associate orange with happiness. Yellow is the colour of   26  . People say it is a  27  colour. They associate yellow too, with  28   . Green is the cool colour of grass in  29   . People say it is a refreshing colour. In general, People  30    two groups of colours. Warm colours and cool colours. The warm colours are red, orange and 31   . Where there are warm colours and  32    light, people usually want to be  33   . Those who like to be with  34   , like red. The cool colours are  35    and blue. Where there are these colours, people are usually worried.

Some scientists say that time seems to  36    more slowly in a room with warm colours. They  37   that a warm colour is a good  38    for a living room or a  39   . People who are having a rest or are eating do not want time to pass quickly.  40    colours are better for some offices if the people working there want time to pass quickly.

21. A. exciting               B. amusing                   C. interesting                 D. entertaining

22. A. sorrow                B. anger                        C. admiration                D. sadness

23. A. roads                  B. ways                        C. danger                      D. places

24. A. frees                   B. leaves                       C. grass                        D. rivers

25. A. lively                  B. dark                         C. noisy                        D. strong

26. A. coffee                 B. light                         C. sunlight                    D. stars

27. A. terrifying            B. sad                           C. happy                       D. cheerful

28. A. anger                  B. happiness                  C. sorrow                      D. hatred

29. A. spring                 B. summer                    C. autumn                     D. winter

30. A. speak                  B. say                           C. talk about                 D. tell

31. A. green                  B. yellow                      C. white                        D. grey

32. A. a lot of                B. lot of                        C. a lot                         D. lots

33. A. calm                   B. sleepy                       C. active                       D. helpful

34. A. the other             B. another                     C. other one                  D. others

35. A. black                  B. green                        C. golden                      D. yellow

36. A. go round             B. go by                       C. go off                       D. go along

37. A. decide                 B. suggest                     C. advise                       D. express

38. A. one                     B. way                          C. fact                          D. matter

39. A. factory                B. classroom                 C. restaurant                  D. clinic

40. A. Different             B. Cool                         C. Warm                       D. All

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