Na2SO4是常用的化工原料，下列说法正确的是 A．Na2SO4中钠、硫、氧三种

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，并在答题卡上将该项涂黑。

It was a family adventure trip. My wife, Judith, our two-year-old daughter, Leila, and I had rented a small camper (旅行车) and were   36   through Baja California. The day before our return to San Diego, we   37   the camper near a beach for one last night in nature.

In the middle of the    38   I was awakened by Judith   39   me with her finger and yelling at me to   40  . My first impressions were of   41   and banging. Fairly confused, I jumped down out of our little loft-bed, and standing without clothes on,   42   the wind screen. 

What I saw   43   me quickly out of my half-dazed state. The camper was   44   by masked men hitting the   45  .

I dove for the driver's seat and tried to start the   46  . The camper had started perfectly at least 50 times that   47  . Now it tried to turn over, sputtered (劈啪作响) a few times, and died. There was the sound of breaking glass, and a hand   48   in through the driver's side window. I hit the hand with a lot of force.

My hand was bleeding   49   the broken glass. I   50   I had one more chance to

start the car. Having played hero   51   a thousand times in fantasy, I never   52   I would do it. I turned the key. The engine sputtered to life... and died. Then someone jammed a gun into my throat. I remember this thought: "You mean I don't save the family?" I was really quite surprised.

One of the men, who spoke a little English, was   53  , " Money! Money!" The gun still at my throat, I reached under the driver's seat and   54   one of them my   55   through the broken window. I was hoping this was the end of it…

36. A. crossing       B. traveling    C. conveying         D. entering   

37. A. threw      B. deleted       C. parked              D. moved   

38. A. camper     B. beach     C. nature         D. night     

39. A. pushing          B. beating       C. controlling     D. holding    

40. A. jump up          B. set up     C. light up         D. get up  

41. A. noise       B. sound     C. voice         D. fantasy   

42. A. grasped     B. crashed      C. faced         D. glanced  

43. A. confused      B. woke     C. feared         D. barked   

44. A. surrounded   B. robbed          C. examined      D. hunted   

45. A. doors       B. windows    C. walls          D. tyres   

46. A. machine       B. engine     C. journey         D. camp  

47. A. moment          B. day       C. time           D. trip  

48. A. came       B. reached      C. trembled       D. peered 

49. A. by         B. at              C. from          D. in  

50. A. suggested     B. figured       C. indicated       D. observed 

51. A. energetically       B. enthusiastically  C. successfully       D. naturally 

52. A. doubted          B. thought      C. imagined       D. required  

53. A. begging          B. translating  C. yelling              D. reminding

54. A. handed     B. offered       C. provided       D. protected 

55. A. trousers          B. license          C. shoes         D. wallet

百日咳、会厌、喉部疾患咳嗽特征为

A．金属音调咳嗽
B．咳嗽声音嘶哑
C．阵发性连续剧咳伴高调吸气回声(鸡鸣样咳嗽)
D．痉挛性咳嗽
E．咳嗽声音低微或无声

若要查询选修课(学号、课程号、成绩)成绩在80分以上的女生姓名，应使用的SELECT语句是______。

A．SELECT姓名FROM学生表，选课表WHERE学生表．学号=选课表．学号；．O
R．性别="女"．AN
D．成绩＞=80B. SELECT姓名FROM学生表，选课表WHERE学生表．学号=选课表．学号；．AN
D．性别："女"．O
R．成绩＞=80C. SELECT姓名FROM学生表，选课表WHERE学生表．学号=选课表．学号；．O
R．性别="女"．O
R．成绩＞=80
D．SELECT姓名FROM学生表，选课表WHERE学生表．学号=选课表．学号；．AN
D．性别："女"．AN
D．成绩＞=80

试述渠道正常运行的要求？

超过1500个座位的剧院和超过2000个座位的会堂舞台的葡萄架下部，应设（）喷水灭火系统。

A、水喷雾

B、雨淋

C、水幕

D、干式