设{an}是等差数列，则能确定数列{an}（） （1）a1+a6=0（2）a1a6

We were delayed at the airport．Otherwise，we    here by lunch．

A．must have been

B．could be

C．should be

D．would have been

第二节：完形填空（共20小题；每小题1.5分，满分30分）

阅读下面短文，从短文后各题所给的四个选项（A、B、C和D)中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

The job of raising children is a tough one. Children don’t come with an instruction manual(说明书). And each child is   36  . So parents sometimes pull their hair out in frustration(挫折),not   37  what to do. But in raising children—as in all of life—what we do is   38  by our culture. Naturally then, American parents teach their children basic American   39 .   To Americans, the goal of parents is to help children  40   on their own two feet. From  41   , each child may get his or her own room. As children grow, they get more   42 to make their own choices.  43  choose their own forms of entertainment, as well as the friends to   44  them with. When they   45 young adulthood, they choose their own jobs and marriage   46  . Of course, many young adults still   47  their parents’ advice and approval for the choices they make. But once they “leave the   48 ” at around 18 to 21 years old, they want to be on their own, not “  49  to their mother’s apron strings (围裙带).   The relationship between parents and children in America is very informal. American parents try to  50 their children as individuals—not as extensions of themselves. They allow them to achieve their own  51  . Americans praise and encourage their children to give them the   52  to succeed. When children become adults, their relationship with their parents becomes more like a(an)   53 among equals. But   54  to popular belief, most adult Americans don’t make their parents pay for room and board when they come to   55  . Even as adult, they respect and honor their parents.

36. A. strange                         B. different                  C. new                        D. unlike

37. A. noticing                  B. remembering       C. knowing                  D. deciding

38. A. influenced             B. made                     C. controlled              D. changed

39. A. services                     B. standards             C. rules                   D. values

40. A. sit                               B. get                          C. stand                   D. rise

41. A. adulthood              B. girlhood            C. boyhood                  D. childhood

42. A. freedom                  B. space                   C. time                        D. money

43. A. Adults                   B. Teenagers            C. Americans                  D. Parents

44. A. help                    B. join                   C. share                   D. provide

45. A. gain                    B. pass                       C. become                   D. reach

46. A. wives                    B. partners                    C. husbands             D. couples

47. A. seek                          B. invite                    C. try                          D. choose

48. A. room                         B. house                         C. nest                         D. place

49. A. connected            B. held                         C. stuck                   D. tied 

50. A. serve                    B. treat                        C. describe                   D. recognize

51. A. jobs                          B. plans                   C. dreams                    D. hopes

52. A. dependence              B. trust                        C. belief                         D. confidence

53. A. friendship             B. companion             C. membership             D. association

54. A. known                    B. similar                    C. contrary                  D. due

55. A. travel                    B. visit                        C. see                          D. live

患者，女性，30岁，产后两周开始下床活动，觉左下肢肿胀疼痛，略发绀，温度升高，表浅静脉曲张，左股静脉走行区有明显压痛，应考虑为（）。

A.血栓性大隐静脉炎

B.血栓性静脉炎

C.局限性股静脉血栓形成

D.左髂股静脉血栓形成

E.皮下出血

（）并不消灭风险源，只是风险承担主体改变。

A.风险转移

B.风险规避

C.风险分散

D.风险对冲

若固定磁头硬盘有16个磁头，每磁道存储量为62500位，盘驱动器转速为24000转/分，则最大数据传输率为（）。

A．10KBps

B．40KBps

C．5MBps

D．40MBps