问题 综合

据报道,上海市2006年多次受到咸潮入侵。经过近15年的数据和技术积累,上海已经具备精确预报咸潮入侵长江口的技术能力。咸潮是指沿海地区海水通过河流或其他渠道倒流进内陆区域后,水中的盐分达到或超过250亳克/升的自然灾害。据此回答:

(1)咸潮发生时,长江口以东海区海水的实际盐度最可能是下图中的哪条曲线:     

(2)咸潮多发生在           地区、

           季节

(3)引发咸潮的因素主要有哪些?

(4)咸潮发生时可能对当地的自然环境及人类活动带来什么危害?

(5)从长远看,防治咸潮可采取哪些措施?

答案

(1)A (2) 沿海(或河口) 冬半年(3)河流流量较小;气候转暖,海平面上升;地势地平。(4)对人体健康造成危害;对企业生产造成威胁,生产设备容易氧化、腐蚀,锅炉容易积垢;造成地下水和土壤内的盐度升高,危害到当地的植物生存。(言之有理即可)(5)加强监测,建立预警机制;采取调水以淡压咸;对河流水资源及河道泥沙等加强统一调度、统一管理;节约用水 

咸潮发生在我国沿海地区,主要原因是河流水量减少,海水倒灌进入陆地,使地下水和河水变咸,属于自然灾害,也与人类活动有关,治理的主要措施是引淡水进入沿海地区的河流中,压制海水进入陆地。

完形填空

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第三部分完形填空(共20小题,每小题1分,计20分)

通读下面短文,掌握其大意,然后从所给的A、B、C、D四个选项中选出一个最佳选项,并在答题卡上将该项涂黑。

I will never forget a special trip to the grocery store some years ago. My father had just recently    51  . I was missing him terribly and hardly getting through a day without    52  . I needed to pull myself together to get some groceries for my young children.

As I entered the store, I    53   had to control my emotions as the    54   smell of my daddy’s favorite cinnamon buns (肉桂卷) made there filled the whole    55  . I made my way up and down the busy passages and    56   my cart (手推车) as I read my list, which I had prepared that morning. I was    57   the in-store bakery when I just couldn’t    58   myself any longer. I held the    59   and quietly cried as I looked at the cinnamon buns.

A gentleman came to my    60   and simply said, “Would you like me to    61   here with you for a moment?” I nodded and the man simply put his hand on top of mine, and stood there    62   supporting me as I cried. Once I gathered myself, I looked into his wonderful eyes and thanked him,    63   I had just lost my father. He simply said there had been such    64   in his life too, when he just needed to cry.

This man    65   me deeply. I realized too many times, we see someone    66   and make guesses about the happenings in their life, when really we should recognize we are all    67   and just need a little    68   sometimes.

Before leaving, I    69   again in the store for this man, but could not find him. I hope that maybe, he or someone who has done this same thing reads this and learns how the gesture    70   the heart of another person.

51. A. calmed down              B. passed away              C. turned up                 D. turned away

52. A. crying                       B. sleeping                   C. researching               D. worrying

53. A. slowly                       B. successfully              C. immediately             D. unluckily

54. A. different                    B. unpleasant                C. bad                          D. sweet

55. A. car                                   B. store                        C. room                       D. bakery

56. A. watched                            B. emptied                   C. filled                       D. discovered

57. A. approaching               B. admiring                  C. leaving                     D. running

58. A. behave                    B. control                            C. enjoy                       D. defend

59. A. note                          B. position                    C. money                            D. cart

60. A. side                           B. attention                   C. help                         D. head         

61. A. work                        B. wait                         C. stand                        D. sit

62. A. nervously                   B. angrily                            C. proudly                    D. quietly

63. A. meaning                    B. explaining                C. arguing                    D. reminding

64. A. moments                    B. chances                    C. dreams                     D. duties

65. A. pleased                      B. touched                    C. disappointed            D. shocked

66. A. unfriendly                  B. impolite                   C. ill                            D. sad

67. A. relatives                     B. strangers                  C. humans                    D. volunteers

68. A. support                      B. wealth                      C. humor                      D. energy

69. A. asked                         B. paid                         C. looked                            D. called

70. A. won                          B. opened                     C. beat                         D. warmed

单项选择题