问题 实验题

小明同学想验证阿基米德原理对于漂浮的物体是否适用,他选择了一个乒乓球做实验,他还需要选择溢水杯、水、小桶和              .步骤如下:

①用测力计测出                               即乒乓球漂浮时受到的浮力.

②用测力计测出                               

③在溢水杯中装满水,放入乒乓球,并                           

④用测力计测出                                .比较实验数据得出的实验结论:漂浮的物体受到的浮力大小也等于排开液体的重.

答案

弹簧测力计;

①乒乓球的重力;

②小桶的重力,记为G1

③用小桶盛接乒乓球溢出的水;

④小桶和溢出水的总重力,记为G2

多项选择题
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)

阅读下面短文,从短文后所给各题的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

When I began my high school years, I was quite interested in biology. I read lots of books of my father’s about animals, and I was   36   much educated about such matters as a 16-year-old could be.

One Sunday afternoon, I was   37  with friends about animals. I said the whale(鲸鱼)was  __38  a mammal animal. They disagreed. Finally, I called a   39  over to help settle the matter. I knew I was  40 , so I was looking forward to the teacher  41   I was right. My friends were eager for an opposite answer. We asked her   42 the whale was a mammal. “No, the whale is a fish,” she said without a moment’s   43  .

You could have knocked me over with a feather. My   44   was hurt because I lost the argument, but that wasn’t the main reason I was too  45 to speak. I still knew I was right, which   __46  the teacher was wrong. Not only was she wrong,   47  she was completely ignorant(无知的) about something I thought was   48   knowledge. But she was a teacher who had taught a long time. Everyone   49   her and no one else thought she could be wrong.

__50  that, I hadn’t known grown-ups could be wrong. This   51  shaped the way I viewed people as I grew up.   52   I found anyone treated another person with too much respect and admiration, I thought——and still think——“   53  silly.” From that point on, I had no  54__ for authority(权威). To earn my respect, you have to be smart or  55   . I’ll never respect you just because you happen to be in charge or have a degree.

36. A. as  B. so       C. too          D. very

37. A. meeting       B. working     C. arguing      D. staying

38. A. about    B. like         C. beside      D. above

39. A. professor     B. biologist     C. librarian     D. teacher

40. A. clever   B. fight       C. creative    D. silly

41. A. proving       B. finding       C. promising   D. hoping

42. A. how     B. why        C. if      D. when

43. A. doubt   B. silence       C. regret  D. hesitation

44. A. heart    B. mind   C. pride   D. feeling

45. A. foolish  B. anxious      C. serious       D. astonished

46. A. meant   B. suggested   C. admitted     D. concluded

47. A. and         B. but     C. for           D. or

48. A. special  B. normal       C. regular       D. common

49. A. pleased B. admired     C. believed     D. loved

50. A. Before  B. After   C. Until   D. Since

51. A. fairly    B. properly     C. nearly D. greatly

52. A. Whenever    B. Although    C. While D. Whether

53. A. I’m         B. that’s  C. he’s    D. you’re

54. A. idea      B. respect       C. choice D. question

55. A. energetic      B. patient       C. talented      D. diligent