在Internet上，为使计算机之间能够彼此通信，需要共同遵守某种协议。现在Inte

下列关于“电解质”相关知识的叙述正确的是（   ）

A．在强电解质的水溶液中只有离子没有分子

B．二氧化碳是弱电解质

C．难溶的化合物不一定是弱电解质

D．卤化氢（HX）均为强电解质

某国去年的商品价格总额为16万亿元，流通中需要的货币量为2万亿元。假如今年该国商品价格总额增长

10%，其他条件不变，理论上今年流通中需要的货币量为 [ ] 

A．1.8万亿元

B．2万亿元 　　

C．2.2万亿元　

D．2.4万亿元

第二节完形填空（共20小题；每小题1分，满分20分）

Learning is natural. It begins the minute we are born. Our  36   teachers are our families. __37    home we learn to speak and to  38  and feed ourselves. We learn these and other skills by  39__ our parents.

Then we go to school. A teacher tells us  40   to learn. Many teachers teach us, and we pass many  41  .Then people say we are  42 .

Are we really educated? Let’s think about the real meaning of  43  . Knowing facts does not mean being able to solve problems. Solving problems  44   creativity, not just a good  45  . Some people who don’t know many facts are good at solving problems.

Henry Ford is a good  46  . He went to school at the age of 15. Later, when his company could not build cars  47  , he solved the problem. He thought of the assembly line (装配线). Today the answer seems  48  . Yet think of the many university graduates who have   49  solved such a problem.

What does a good teacher do? Does he give students facts to 50  ? NO! A good teacher shows how to find answers. He shows us to the  51   of knowledge so we can learn to think for ourselves. When we are  52  , we know where to go.

True learning combines（联系） intake with output. We take information  53   our brains. Then we use it. Think of a computer, it stores a lot of  54   but it can’t think. It only  55    commands. A person who only remembers facts hasn’t really learned. Learning takes place only when a person can use what he knows.

36. A. first               B. good                C. normal             D. second

37. A. On                B. To                 C. At                    D. With

38. A. dress              B. wear                C. put on              D. have on

39. A. asking                B. exercise            C. listening           D. following

40. A. who                   B. that                  C. when                D. what

41. A. stations            B. exams              C. people              D. pencils

42. A. educated          B. students            C. suffered            D. controlled

43. A. absorbing            B. taking              C. learning            D. growing

44. A. is                       B. requires            C. brings              D. gets

45. A. memory         B. word                 C. thing            D. condition

46. A. teacher           B. learner             C. example           D. driver

47. A. enough quickly    B. fast enough       C. enough fast        D. enough rapidly

48. A. simple                B. ordinary           C. good               D. special

49. A. never                  B. seldom             C. almost              D. ever

50. A. need              B. follow              C. learn                D. remember

51. A. plenty                 B. pile                  C. much                      D. stream(溪流)

52. A. hungry           B. thirsty              C. cold                 D. sleeping

53. A. into               B. for                   C. of                   D. about

54. A. words                 B. languages          C. fact              D. information

55. A. obeys                 B. gives                 C. passes               D. gets

水平面上有两个质量都为m的物体a和b，它们之间用轻绳连接，它们与水平面之间的滑动摩擦系数都为μ。在水平恒力F的作用下，a和b在水平面上作匀速直线运动，如图所示。如果在运动中绳突然断了，那么a、b的运动情况可能是

A．a作匀加速直线运动，b作匀减速直线运动；

B．a作匀加速直线运动，b处于静止；

C．a作匀速直线运动，b作匀减速直线运动；

D．绳子刚断时它们的加速度大小都为μg。

IPv6的地址长度是

A．32bit

B．64bit

C．128bit

D．256bit