学好化学能使我们更好地认识各种现象,更合理地解决实际问题,更轻松地应对生活中可能

题型:填空题

问题:

学好化学能使我们更好地认识各种现象,更合理地解决实际问题,更轻松地应对生活中可能出现的突发事件。

(1)常用洗洁精洗涤油污,因为洗洁精与油、水混合会产生________作用;冬天常在汽车的水箱中加入少量乙二醇之类的化合物可以防止水箱中的水结冰,因为乙二醇溶于水后使溶液的凝固点__________ 。(填“升高”或“降低”)

(2)不同的铁制品所采取的铁的保护方法有所不同。如自行车的链条常采用__________的方法防锈,自行车的车身常采用__________的方法防锈。

(3)不同的火灾所采取的灭火方式也有所不同。如扑灭火势凶猛、蔓延迅速的森林火灾时通常采取的方法是___________;扑灭用电线路老化而引起的火灾时应先__________,再进行灭火。

考点:灭火的原理和方法安全措施和生活经验乳化和乳化作用金属的锈蚀与防护
题型:填空题

第二节完型填空(共20小题;每小题1分,满分20分)

阅读下面短文,掌握其大意,然后从第21—40各题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卷上将该项涂黑。

A group of class friends, highly established in their careers, got together to visit their old university professor. Conversation soon  41  into complaints about pressure in work and life.

While the guests were talking, the professor went to the  42  and prepared coffee. Then he   43  with a large pot of coffee and a variety of cups — porcelain (瓷) , plastic, glass, crystal, some  44  looking, some expensive, some delicate (精致) — telling them to  45  themselves to the coffee.

When all the students had a cup of coffee  46  hand, the professor said, “If you noticed, all the nice-looking, expensive cups were taken up,  47  behind the plain and cheap ones. While it is  48  for you to choose the best for yourselves, that is the  49  of your problems and pressure. Be assured that the cup itself  50  no quality to the coffee. In most cases it is just more expensive and in some cases even hides what we drink. Though  51  all of you really wanted was coffee, not the cup, you  52  the best cups directly. And then you began  53  each other’s cups.”

The professor paused and then went on, “Now consider this: Life is the coffee and the jobs, money and  54  in society are the cups. They are just tools to hold and  55  life and they do not change the  56  of life. Sometimes, by concentrating only on the cup, we  57  to enjoy the coffee God has  58  for us. God brews the coffee, not the cup…Enjoy your coffee!

The happiest people don’t have the best of everything. They just  59  the best use of everything.

Live simply. Love generously. Care deeply. Speak kindly. Leave the  60  to God.

41. A. stopped              B. looked            C. became           D. turned

42. A. kitchen              B. bedroom         C. study                D. living-room

43. A. went                  B. got                  C. returned           D. turned

44. A. plain                  B. clean              C. ugly                  D. fine

45. A. enjoy               B. help                      C. offer                D. devote

46. A. for                  B. by                   C. in                    D. with

47. A. falling                    B. leaving            C. hiding               D. keeping

48. A. natural                B. formal            C. necessary      D. important

49. A. answer                B. cause               C. result                D. reason

50. A. adapts                 B. puts              C. applies             D. adds

51. A. as             B. that              C. what                 D. which

52. A. cared for          B. called for     C. looked for       D. went for

53. A. facing                B. eyeing            C. smelling       D. tasting

54. A. condition            B. attitude           C. position        D. situation

55. A. contain              B. include           C. control                 D. experience

56. A. quality                      B. color         C. cost          D. style

57. A. manage         B. start                 C. hope            D. fail

58. A. shown              B. taken        C. sent           D. provided

59. A. keep            B. make                     C. take                 D. hold

60. A. complex         B. remains           C. rest              D. complaints

题型:填空题

目前我国生产的锅炉,水平烟道的对流过热器是()布置的,而垂直竖井烟道是()布置

题型:填空题

女,5岁,因发热、扁桃体化脓口服抗生素和阿司匹林1周,突然呕吐深咖啡色液体 50ml,隐血阳性,既往无胃肠病史及胃肠病家族史,该患儿最有可能的诊断是

A.药物性胃炎

B.过敏性紫癜

C.十二指肠壶腹溃疡出血

D.上消化道血管畸形

E.食管炎

题型:填空题

在进行火灾风险评估中采用事件树分析法进行分析时,确定初始事件的方法有:()。

A.根据系统设计确定

B.根据系统危险性评价确定

C.根据系统运行经验或事故经验确定

D.根据系统事故树分析,从其中间事件或是初始事件中选择

E.根据结果事件确定

题型:填空题

电传操纵系统与电信号操纵系统的区别是().

A.电信号操纵系统由多重余度,而电传操纵系统不需要.

B.电传操纵系统等于电信号操纵系统加上控制增稳系统

C.电信号操纵系统依靠电信号传递指令,而电传操纵系统不是。

D.电传操纵系统依靠机械系统操纵飞机,而电信号系统依靠电机械系统操纵飞机。

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