问题 填空题

如图是一种常用的动圈式话筒,(麦克风)及原理图。当你对着话筒说话时,声带      发出声音,声波使与膜片相连的线圈振动。线圈在磁场中的这种振动,能产生随着声音变化而变化的电流,这是       现象。

答案

振动;电磁感应

完形填空

第二节:完形填空(共15小题;每小题2分,满分30分)

阅读下面短文,掌握其大意,然后从41~55各题所给的四个选项(A、B、C和D)中,

选出最佳选项。

It was the afternoon of December 24, the day before Christmas, but I had to stay to tidy the office. The only thing that ­_41_ my day was the beautifully decorated Christmas tree in our waiting room and a _42_ sent to me by a fellow I was dating—a dozen long-stemmed red roses.

Suddenly, our receptionist came and said there was a lady outside that urgently needed to speak with me. As I stepped out, I noticed a young _43_ woman with a baby in her arms standing there. 44_ , she explained that her husband—a prisoner in a nearby prison—was my next patient. She told me she wasn’t allowed to visit her husband in prison and _45_ he had never seen his son. So she _46_ me to let her wait here ahead of time. I agreed. After all , it was Christmas Eve.

A short time later, her husband arrived—with chains on his feet, cuffs on his hands, and two armed guards _47_ him. The woman’s tired face _48_ when her husband took a seat beside her. I watched them laugh, cry, and share their _49_ . He seemed like a gentle and honest man.

At the end of the _50_ , the man had to go back and I wished him a Merry Christmas. He smiled and thanked me and said he felt saddened by the fact that he hadn’t been able to get his wife _51_ for Christmas. On hearing this, I was _52_ with a wonderful idea.

I’ll never forget the _53_ on both their faces as the prisoner gave his wife the beautiful, long-stemmed red roses. I’m not sure who _54_ the most joy—the husband in giving, the wife in receiving, or myself in having the opportunity to share in this _55_ moment.

41. A. enjoyed              B. brightened                  C. relaxed             D. presented

42. A. gift                    B. regards                    C. message            D. package

43. A. ordinary-looking B. good-looking       C. tired-looking     D. frightened-looking

44. A. Happily             B. Quietly                    C. Excitedly          D. Nervously

45. A. why                   B. how                        C. that                  D. when

46. A. persuaded       B. demanded            C. begged             D. pleased

47. A. near                   B. around                    C. behind              D. before

48. A. turned pale     B. went red                  C. lit up            D. turned away

49. A. child                  B. tears                        C. joy                   D. sorrows

50. A. meeting             B. appointment             C. discussion     D. conversation

51. A. something      B. nothing                 C. anything           D. everything

52. A. encouraged      B. struck                      C. provided           D. inspired

53. A. sadness              B. happiness             C. look                 D. smiles

54. A. experienced           B. received                  C. gave                 D. accepted

55. A. unforgettable      B. sad                          C. happy               D. special

问答题