问题 填空题

某计算机中一个16位的二进制代码1101 1110 0101 1000,它若表示的是一个浮点数,该浮点数格式如下:


其中,阶码为移码(又叫增码),基数为2,尾数用补码表示。则该浮点数的值(十进制)是______。

答案

参考答案:-6.625

解析: 阶码[1101]=[0101]=[5]10
尾数[111001011000]=[100110101000]=[-0.00110101]真值
结果为:-0.00110101×25=[-110.101]2=[-6.625]10

单项选择题
完形填空

第二节:完形填空(共20小题;每小题1.5分,满分30分)

It is difficult for you to get up in the morning? Do you sometime oversleep? Are you often late for work or school? Yes? Then Hiroyuki Sugiyama of Japan has a(n)  36  bed for you. Hiroyuki’s bed will  37  you up in the morning! Here is how it  38  .

The bed  39  an alarm clock. First, the alarm clock rings. You have a few minutes to wake up. Next, a tape recorder in the bed plays  40  music or other pleasant sounds. The tape recorder in Hiroyuki’s bed plays a recording of his girlfriend. She whispers in a sweet  41  , “Wake up, darling, please.” A few minutes later, a second recording 42  . The sound recording can be loud music or  43  sounds. Hiroyuki hears a recording of his boss  44  , “Wake up immediately,  45  you’ll be late!”

If you don’t get up  46  the second recording, you  47  be sorry! A mechanical “foot” is in the bed. The mechanical foot kicks you in the head. Then the bed waits a few  48  minutes. What! You’re  49  in bed! Slowly the  50  of the bed rises higher and higher. The foot of the bed goes lower and lower.  51  , the bed is vertical (垂直的). You slide off the bed and onto the floor. You are out of bed and  52  .

Hiroyuki made his bed because he wanted to  53  a contest. He works for Honda Motor Company. Once every two years Honda has a contest for its 200,000 employees—“All-Honda Idea Contest”. The employees think of new  54  . If their ideas win, the employees win 55  . Hiroyuki Sugiyama won one of the top prizes for his bed.

36. A. expensive      B. special        C. valuable      D. comfortable

37. A. get            B. catch          C. make           D. let

38. A. works          B. runs           C. happens        D. moves

39. A. is separated from                B. is made up of

C. is connected to                  D. is made into

40. A. loud           B. classical      C. pop            D. soft

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

42. A. sends          B. turns          C. plays          D. appears

43. A. pleasant       B. interesting    C. unpleasant     D. funny

44. A. shouts         B. calls          C. whispers       D. persuades

45. A. and            B. but            C. so             D. or

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

47. A. can            B. will           C. may            D. would

48. A. other          B. another        C. more           D. one

49. A. still          B. yet            C. already        D. even

50. A. end            B. middle         C. body           D. top

51. A. However        B. Finally        C. Therefore      D. Otherwise

52. A. angry          B. work           C. happy          D. awake

53. A. achieve        B. win            C. gain           D. defeat

54. A. ideas          B. thoughts       C. facts          D. ways

55. A. praises        B. contests       C. prizes         D. medals