问题 选择题

将一定量的金属钠放入一定物质的量浓度的NaOH溶液中,反应完成后,NaOH溶液的物质的量浓度                  (   )

A.增大

B.不能确定

C.减少

D.不变

答案

答案:B

选B

当原NaOH溶液是饱和溶液时,反应后浓度不变;当原NaOH溶液是不饱和溶液时,反应后浓度增大。

完形填空

The telephone rang in my ninth-grade high school classroom.“Jill , please come to the counseling office (教导处)!”As I walked down the hall ,I  36  , why would someone want me to come to the counseling office? As I stepped into the counseling office ,I was   37  by a girl who needed to speak to someone about her friend. I was reassured by the school counselor (辅导员) that I was not   38  and that someone needed to talk with me. I was called because I was a member of   39 .

The Breakfast Club is   40  a club where one eats breakfast . It is an organization of   41  started thirteen years ago   42  a young student’ s suicide (自杀). His mother thought that it could have been prevented   43  her son talked to someone about how he was feeling.

The B. C. as we call it   44  ,give us an opportunity to   45  talk to our peers (同辈) about anything on their minds and   46  .Our   47  :We care but we don’t cure. Members from the previous year ,teachers ,and counselors   48  students for the Breakfast Club. The club is a   49  group including ,Asians ,blacks, whites, ,athletes, musicians, and students with all levels of   50  achievement ,The criteria (条件) for   51  the group is to be a good   52  ,be able to brainstorm ideas, and   53  give advice! We barely knew one another in the beginning , but we became  54  after all the training   55  we went through.

36. A. knew               B. wondered      C. murmured        D. shouted

37. A. met                B. hit            C. greeted           D. seated

38. A. in need             B. in difficulty     C. in trouble         D. in time

39. A. the counseling office  B. the school      C. our class          D. the Breakfast Club

40. A. just                B. only          C. such              D. not

41. A. teachers            B. students       C. blacks and whites   D. parents

42. A. as a result of        B.against         C. because           D. regardless of

43. A. if                 B. for            C. had              D. did

44. A. at present          B. in brief         C. for fun          D. for short

45. A. privately           B. secretly        C. frankly           D. kindly

46. A. in their family      B. in their hearts    C. in their school      D. from their friends

47. A. belief             B. banner          C. note             D. motto

48. A. select             B. permit          C. recognize         D. thank

49. A. perfect            B. international     C. diverse           D. morning

50. A. working           B. various         C. different          D. academic

51. A. going to          B. belonging to     C. contacting        D. participating

52. A. organizer          B. student         C. listener           D. speaker

53. A. quickly            B. then           C. not               D. yet

54. A. fast friends         B. common friends  C. strong opponents   D. dear relatives

55. A. study             B. care           C.struggle          D. experiences

单项选择题