各种生物由于食物关系而形成的联系，叫做食物链，食物链延缓此交错，形成网状，又构成

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第二节: 完形填空（共20小题；每小题1分，满分20分）

阅读下面短文，掌握其大意，然后从36—55各题所给的四个选项（A、B、C和D）中，选出最佳选项。

I think we should try to find a happy memory, something to lift us up on those unpleasant days. I'm saying this because I think I just found mine!

I had some work in Glasgow then. I was on a really  36  schedule, which meant I would have no time for myself all day. I was having one of those days, the train was completely  37  and the conversation going on around me seemed to be particularly  38  . Besides, I had a bit of a headache.   _39   quickly across the station hall, I fished some  40  from my pocket. There was usually someone at the exit   41   The Big Issue ( a magazine that helps homeless folk earn a living).

_42  the crowd parted ways at the bottom of the hall, I saw someone selling the

Big Issue. She really looked like she'd been sleeping  43  . Her clothes were  44  and she obviously hadn't had a scrub up (擦洗) for quite a while.

As I  45   the exit, I saw that she was  46  from side to side. At first I thought maybe she was trying to keep  47  against the biting wind. But she wasn't, she was moving in time to a  48 . I couldn’t hear her, but I could see her lips moving.

When I got closer, I saw a white  49  hanging from her elbow and noticed that she had sunken eyes. She was  50 , dirty and living on tile streets. I came closer and through the  51  of the traffic I heard her  52  the immortal (不朽的)line, "... and I think to myself, what a wonderful world!"

I bought her last magazine for twice what I'd originally  53  . She thanked me, then she  54_     her belongings and went tapping off along the pavement – still singing!

So, I have my happy  55  for the day. And I think it will stay with me a long, long time.

36. A. enjoyable            B. relaxing           C. tight              D. tiring

37. A. crowded             B. delayed           C. loaded            D. crashed

38. A. moving             B. interesting          C. pleasing           D. meaningless

39. A. Crawling            B. Walking           C. Wandering        D. Searching

40. A. cigarettes           B. sweets             C. change             D. paper

41. A. selling               B. buying            C. collecting          D. delivering

42. A. With                B. Since             C. Until             D. As

43. A. comfortably          B. rough             C. soundly           D. anxiously

44. A. ragged              B. costly             C. tidy               D. fashionable

45. A. left                 B. passed            C. approached        D. examined

46. A. jumping             B. climbing           C. rolling             D. rocking

47. A. active                B. energetic         C. warm             D. awake

48. A. dance              B. tune              C. step                D. sound

49. A. issue                B. arm              C. stick               D. log

50. A. deaf                B. lame              C. mad              D. blind

51. A. noise                B. music             C. voice               D. whistle

52. A. recite               B. compose           C. read              D. sing

53. A. expected            B. charged           C. intended          D. organized

54. A. picked up            B. throw away        C. put down           D. hid away

55. A. decision             B. memory           C. program          D. design

管压降是指二级管导通时的（）

A、压降

B、反向压降

C、正向压降

D、电压降

公路曲线路段的中心线在平面上所对应的半径称为（）。

A.线段

B.竖曲线

C.曲线半径

D.中心线

以下不属于HACCP原理的是（）

A.危害分析确立预防措施

B.描述产品流程图

C.建立纠偏措施

D.确定关键控制点

在一个C++程序中，每个变量都必须遵循 【6】 的原则。