原发性免疫缺陷病的相对发病率为20%的是 A．单纯抗体缺陷 B．细胞免疫缺陷 C．联

函数f（x）=x-2+log₂（a-2^x）存在零点，则实数a的取值范围是 ______．

第二节 完型填空（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。

A ship hit a rock on its way back. The only   36    of the shipwreck was washed up on a small,    37        island. He prayed    38   for God to rescue him, and every day he scanned the   39      for help, but none seemed forthcoming.

Exhausted, he eventually managed to build a little hut   40    driftwood to protect him from the bad weather, and to store his few    41       . But then one day, after searching for food, he arrived home to   42    his little hut in flames, the   43     rolling up to the sky.

The    44    had happened; everything was lost.

He was shocked with grief and  45 . “God how could you do this to me!” he cried.

Early the next day, however, he was awakened by the  46  of a ship that was   47    the island. It had come to rescue him. "How did you know I was here?" asked the tired man of his   48  . “We saw your smoke  49   ,”they replied.

It is easy to get    50   when things are going bad.

But we shouldn't   51  , because Nature is    52   in our lives, even in the midst of pain and   53     .

Remember,    54     your little hut is burning to the ground it just may be a smoke signal that summons the grace of Nature.

For all the negative things we have to say to ourselves, Nature has a   55  answer for it .

36. A. captain       B. boss            C. friend        D. survior

37. A. lonely        B. populated       C. rich           D. poor

38. A. happily       B. feverishly       C. sadly          D. surprisingly

39. A. horizon       B. sky            C. land           D. tree

40. A. by           B. with           C. out of          D. in

41. A. possessions    B. food           C. furniture       D. animals

42. A; look for       B. find            C. search        D. search for

43. A. fire          B. cloud           C. smoke         D. wind

44. A. best         B. worst          C. most           D. least

45. A. sadness      B. silence         C. fear            D. anger

46. A. sound       B. voice           C. whisper         D. footstep

47. A. reaching     B. arriving in       C. approaching      D. getting to

48. A. friends       B. rescuers        C. searchers        D. brothers

49. A. sign         B. mark           C. scene           D. signal

50. A. encouraged   B. discouraged      C. enabled         D. disabled

51. A. lose heart    B. lose our heart     C. Lose a heart      D. lose hearts

52. A. at work      B. at play          C. at large          D. at table

53. A. blame       B. suffering        C. praise           D. wandering

54. A. the first time  B. the last time     C. every time       D. next time

55. A. wrong       B. right           C. different         D. positive

革新消费者

陈村拦河闸设计过闸流量2000m³/s，河道两岸堤防级别为1级，在拦河闸工程建设中发生如下事件：

事件1：招标人对主体工程施工标进行公开招标，招标人拟定的招标公告中有如下内容：

1、投标人须具备提防工程专业承包一级资质，信誉佳，财务状况良好，类似工程经验丰富。

2、投标人必须具有××省颁发的投标许可证和安全生产许可证。

3、凡有意参加投标者，须派员持有关证件于2006年6月15日上午8：00-12：00，下午14：30-17：30向招标人购买招标文件。

4、定于2006年6月22日下午3：00在×××市新华宾馆五楼会议室召开标前会，投标人必须参加。

事件2：由于石材短缺，为满足工期的需要，监理人指示承包人将护坡型式由砌石变更为混凝土砌块，按照合同约定，双方依据现行水利工程概（估）算编制管理规定编制了混凝土砌块单价，单价中人工费、材料费、机械使用费分别为10元/m³、389元/m³、1元/m³。受混凝土砌块生产安装工艺限制，承包人无力完成，发包人向承包人推荐了专业化生产安装企业A作为发包人。

事件3：按照施工进度计划，施工期第1月承包人应当完成基坑降水、基坑开挖（部分）和基础处理（部分）的任务，除基坑降水是承包人应完成的临时工程总价承包项目外，其余均是单价承包项目，为了确定基坑降水方案，承包人对基坑降水区域进行补充勘探，发生费用3万元，施工期第1月末承包人申报的结算工程量清单如下表所示：

指出上述公告中的不合理之处。

损益表