日本多地震的原因主要是位于两大板块交界处，这两大板块是 ①亚欧板块②美洲板块③太

有A、B、C、D四种元素，B的单质B₂在常温下是气体；B和C两元素都能跟元素D化合分别形成共价化合物DB和D₂C，D₂C在常温下是液体，A、B、C三种元素能形成化合物ABC₃，ABC₃在一定条件下分解得离子化合物AB及单质C₂；A⁺和B^-具有相同的Ar原子电子层排布；液态的单质D可作高能燃料．据此推断：

（1）A、B、C、D的元素符号：A、______；B、______；C、______；D、______；

（2）写出上述有关化学反应的化学方程式______．

神经细胞动作电位的幅度接近于

A．静息电位绝对值与钠平衡电位之差

B．钠平衡电位

C．静息电位绝对值与钠平衡电位之和

D．钾平衡电位

E．超射值

第二节 完形填空（共20小题；每小题1.5分，满分30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_{K_S_5_U}

Years ago, when Barbara started looking for her first job, wise advisers urged, "Be enthusiastic! Enthusiasm will take you further than any amount of experience." How right they were. Enthusiastic people can   36  a boring drive into an adventure, extra work into opportunity and strangers into friends.

"Nothing great was ever   37  without enthusiasm," wrote Ralph Waldo Emerson.     38  is the paste that helps you hang on there when the going gets tough. It is the   39  voice that whispers, "I can do it!" when others shout, "No, you can't!"

It  40  years and years for the early work of Barbara McClintock, a geneticist who won the 1983 Nobel Prize in medicine, to be generally accepted. Yet she didn't 41  on her experiments. Work was  42  a deep pleasure for her that she never thought of stopping.

As author and poet Samuel Ullman once wrote, "Years wrinkle(使起皱纹) the skin, but to give up enthusiasm wrinkles the soul." How do you rediscover the enthusiasm of your childhood? The answer, I believe,   43   the word itself. “Enthusiasm” comes from the Greek and means "God within." And what is God within is but a long-lasting sense of   44  -- proper love of self and, from that, love of others.

Enthusiastic people also love what they do,   45  money or title or power. Patricia McIlrath, retired director of the Missouri Repertory Theater in Kansas City, was once asked where she got her enthusiasm. She replied, "My father, a lawyer, long ago told me, `I never made a dime until I stopped working for money.'" If we cannot do what we love as a full-time career, we can as a part-time hobby   46  the head of state who paints, the nun(修女) who runs marathons, and the executive who handcrafts furniture.

Elizabeth Layton of Wellsville was 68  47  she began to draw. This activity ended periods of depression that had   48  her for at least 30 years, and the quality of her work led one critic to say, " I have to say, Layton is  49  a genius." Elizabeth has  50  her enthusiasm. _{￥高#考#资%源*网}

We can't   51  to waste tears on "might-have-beens." We need to turn the tears into sweat as we go after "what-can-be". We need to live each moment   52  with all our senses -- finding pleasure in the fragrance of a back-yard garden, the   53  picture of a six-year-old, and the enchanting beauty of a rainbow. It is such enthusiastic love of   54  that puts a sparkle(火花) in our eyes, a lift in our steps and   55  the wrinkles from our souls.

36. A. put                            B. make                C. turn                  D. get

37. A. expected             B. adopted             C. predicted           D. achieved

38. A. It                       B. That                  C. This                  D. As

39. A. slight                  B. outside              C. inner                 D. low

40. A. spent                  B. took                  C. cost                  D. paid

41. A. give off                     B. give in                 C. give out            D. give up

42. A. such                   B. so                     C. too                   D. rather

43. A. links with           B. refers to            C. lies in               D. leads in

44. A. responsibility      B. humor               C. trust                  D. love

45. A. in case                B. regardless of      C. for fear of         D. in terms of

46. A. like                    B. namely              C. as                     D. likewise

47. A. after                   B. since                 C. before               D. until

48. A. pleased              B. shocked             C. worried             D. annoyed

49. A. nothing but         B. anything but      C. everything but   D. something but

50. A. recalled                     B. reflected            C. rediscovered      D. remembered

51. A. pay                    B. afford               C. affect                D. provide

52. A. thoroughly          B. absolutely          C. wholeheartedly  D. warm-heartedly

53. A. colored               B. white                C. green                D. red

54. A. money                B. title                  C. power               D. life

55. A. pushes                B. softens              C. smoothes           D. folds

这几年，“考生该不该复读”这个话题一直为社会各界所关注。下表是你班同学讨论的结果，请你给英文报社写一封信，客观介绍讲座情况，并简要阐述自己的观点。

Dear Editor,

I'm writing to tell you about the discussion we've had about whether students retake classes

扩张型心肌病超声心动图检查不可能出现（）

A.二尖瓣反流

B.三尖瓣反流

C.二尖瓣狭窄

D.室壁运动普遍减弱

E.心室扩大