问题 单项选择题

下面描述正确的是 (60) 。

A.数据仓库是从数据库中导入大量的数据,并对结构和存储进行组织以提高查询效率

B.使用数据仓库的目的在于对已有数据进行高速的汇总和统计

C.数据挖掘是采用适当的算法,从数据仓库的海量数据中提取中潜在的信息和知识

D.OLAP 技术为提高处理效率,必须绕过DBMS 直接对物理数据进行读取和写入

答案

参考答案:C

完形填空

We may look at the world around us, but somehow we manage not to see it until whatever we’ve become used to suddenly disappears. ___36___, for example, the neatly-dressed woman I ___37___ to see--or look at--on my way to work each morning.

For three years, no matter ___38___ the weather was like, she was always waiting at the bus stop around 8:00 am. On ___39___days, she wore heavy clothes and a pair of woolen gloves. Sometimes ___40___out neat, belted cotton dresses and a hat pulled low over her sunglasses. ___41___, she was an ordinary working woman. Of course, I ___42___ all this only after she was seen no more. It was then that I realized how ___43___ I expected to see her each morning. You might say I ___44___ her.

“Did she have an accident? Something ___45___?” I thought to myself about her ___46___. Now that she was gone, I felt I had ___47___ her. I began to realize that part of our ___48___ life probably includes such chance meetings with familiar ___49___: the milkman you see at dawn, the woman who ___50___walks her dog along the street every morning, the twin brothers you see at the library. Such people are ___51___markers in our lives. They add weight to our ___52___ of place and belonging.

Think about it. ___53___, while walking to work, we mark where we are by ___54___ a certain building, why should we not mark where we are when we pass a familiar, though ___55___ person?

36. A. Make    B. Take   C. Give   D. Have

37. A. happened     B. wanted       C. used    D. tried

38. A. what     B. how    C. which D. when

39. A. sunny   B. rainy   C. cloudy       D. snowy

40. A. took     B. brought      C. carried       D. turned

41. A. Clearly B. Particularly       C. Luckily      D. Especially

42. A. believed       B. expressed   C. remembered      D. wondered

43. A. long     B. often   C. soon   D. much

44. A. respected     B. missed       C. praised       D. admired

45. A. better   B. worse  C. more   D. less

46. A. disappearance      B. appearance C. misfortune  D. fortune

47. A. forgotten     B. lost     C. known       D. hurt

48. A. happy   B. enjoyable   C. frequent     D. daily

49. A. friends  B. strangers    C. tourists       D. guests

50. A. regularly      B. actually      C. hardly D. probably

51. A. common      B. pleasant      C. important   D. faithful

52. A. choice  B. knowledge  C. decision     D. sense

53. A. Because       B. If       C. Although    D. However

54. A. keeping       B. changing    C. passing       D. mentioning

55. A. unnamed      B. unforgettable     C. unbelievable      D. unreal

单项选择题