问题 单项选择题

EIA/TIA-568标准规定,在综合布线时,如果信息插座到网卡之间使用无屏蔽双绞线,布线距离最大为______米。

A.10
B.30
C.50
D.100

答案

参考答案:A

解析: 工作区子系统指信息插座与数据终端之间的连接设置系统,由从信息插座延伸至数据终端设备的连接线缆和适配器组成。它一般使用软线(Patch Cable)材料(例如UTP/STP)实现终端设备与信息插座之间的连接。工作区的跳线(Patch Cord)、连接设备的跳线、交叉连接(Cross-Connection)线的总长度一般不超过10米。其中交叉连接线或跳线的长度不应超过5米。

单项选择题
完形填空

A wise man once said, “A man who makes no mistakes usually does not make anything.” It took me a long time to gather the   36  to admit that I had been making mistakes since my earliest days.   37  , many of the things that I had learned were   38  .

As a child from a poor family, I learned that when you had money, you were   39   to spend it on whatever brought you happiness   40  . I didn’t understand that even though putting money in the bank would not   41   me that quick joy, it could provide a sense of   42  — I still had that money.

One problem is that I never had an opportunity to   43   any money of my own until late in my teen years. All of my gift money   44   to my parents for “saving”, which actually   45   to be an emergency fund(风险基金) for things such as food.

On rare   46  , some relatives would give me some money, but they would   47   in my ear not to tell my mother and to spend it quickly on something fun. Their   48   was good — they wanted to bring joy to the life of a “  49  ”boy, but it didn’t teach me any   50   skills. Soon I would go back to having no money.

Another thing is that I believed that   51   help from others was bad. My parents were strict, and in many ways I   52   their philosophy (处事原则), but their personal beliefs prevented them from ever accepting any help.   53   we often had to live on a single part-time income, we never asked   54   anything. In this way, I was led to believe that accepting a helping hand, even in   55   of great need, was a sign of weakness.

36. A. time                          B. power                      C. courage                    D. chance

37. A. Otherwise                  B. Also                         C. Instead                        D. However

38. A. different                    B. common                   C. big                          D. wrong

39. A. supposed                    B. determined               C. ordered                    D. left

40. A. naturally                    B. immediately             C. probably                  D. eventually

41. A. buy                           B. prove                       C. sell                          D. show

42. A. direction                    B. guilty                       C. safety                       D. difference

43. A. receive                  B. lend                         C. manage                    D. earn

44. A. gave                          B. went                        C. borrowed                 D. left

45. A. added up                    B. came up                   C. gave out                   D. turned out

46. A. states                         B. occasions                  C. situations                  D. moments

47. A. shout                         B. explain                     C. whisper                    D. insist

48. A. plan                          B. information                     C. look                         D. intention

49. A. naughty                         B. poor                       C. hopeless                   D. lovely

50. A. financial                    B. imaginative                     C. popular                    D. formal

51. A. offering                         B. accepting                C. begging                    D. demanding

52. A. disobeyed                  B. ignored                    C. respected                  D. agreed

53. A. Even if                   B. Now that                C. Unless                      D. Until

54. A. about                         B. around                            C. against                            D. for

55. A. groups                    B. terms                            C. ways                        D. times