问题 选择题

下列物质属于纯净物的是

              

A.茶饮料

B.矿泉水

C.纯牛奶

D.蒸馏水

答案

答案:D

题目分析:根据物质的组成可将物质分为纯净物和混合物。

A、茶饮料,有多种物质组成,属于混合物;

B、矿泉水,有多种物质组成,属于混合物;

C、纯牛奶,有多种物质组成,属于混合物;

D、蒸馏水,有一种物质组成,属于纯净物。故选D

点评:由一种物质组成的物质叫做纯净物,由多种物质组成的物质叫做混合物。

完形填空

Ella Fant was a middle-aged lady who lived with her only son John in a small house. She   26  John very much. In her   27  he couldn't do anything   28 . Every morning she would give him breakfast   29  bed and bring him the papers to   30  . It isn't really true that he was too   31  to work-in fact he had tried a few   32 . First of all he was a window-cleaner and in his first week he managed to   33  at least six windows. Then he   34  a bus conductor and on his second 35  a passenger stole his bag with all the fare (车费) collected. He   36  lost his job as a postman   37  he sent off all the letters when he should have taken them to people's houses. It seemed that there was   38   suitable work for him. So he    39   to join the army. Mrs. Fant was so   40  about this that she told the   41  to all her neighbours. “My John is going to be a soldier,” she said, “He is going to be the best soldier there   42  was, I can tell you!”

Then the great day came   43  he was to march past the palace in the parade (接受检阅的队伍). His   44  mother travelled to the city early in the morning to be sure of getting a good   45  in the crowd.

The parade was full of sound and colour. But when John and his   46  came in sight some of the people watching   47  laughing at the one who couldn't keep pace with the others as they marched along.

But Ella Fant , who was filled with    48  , shouted at the top of her voice, “Look at   49  ! They're all out of   50  except my John! Isn't he the best!”

26. A. depended on       B. waited on               C. trusted             D. loved

27. A. hope                        B. eyes                                C. head                 D. beliefs

28. A. wrong                      B. great                             C. good                    D. strange

29. A. to                            B. at                                  C. in                         D. by

30. A. check                B. read                              C. keep              D. sign

31. A. lazy                         B. young                           C. weak             D. shy

32. A. ones                        B. years                             C. tasks              D. jobs

33. A. rub                          B. drop                            C. break                    D. clean

34. A. followed           B. met                                 C. became                D. found

35. A. day                           B. try                                  C. route                    D. chance

36. A. thus                           B. even                               C. once                D. only

37. A. even if              B. so that                           C. because             D. though

38. A. some                       B. such                              C. less                        D. no

39. A. began                      B. promised                       C. managed           D. decided

40. A. excited                     B. worried                         C. anxious                  D. curious

41. A. incident                     B. change                          C. news                      D. matter

42. A. yet                            B. ever                                C. never                     D. just

43. A. where                      B. since                             C. when               D. till

44. A. proud                      B. kind                              C. strict                      D. lucky

45. A. time                        B. position                         C. experience       D. impression

46. A. neighbours          B. army officer               C. mother                  D. fellow soldiers

47. A. couldn't help              B. shouldn't burst out   C. stopped           D. kept

48. A. sadness               B. happiness                     C. surprise                  D. regret

49. A. them                        B. those                             C. that                        D. him

50. A. sight                          B. order                             C. mind                      D. step

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