问题 选择题

用NaCl固体配制0.1 mol·L-1的NaCl溶液,下列操作或说法正确的是

A.将5.85gNaCl固体溶于1 L水中可配成0.1 mol·L-1的NaCl溶液

B.称量时,将固体NaCl直接放在天平左盘上

C.固体溶解后,将溶液转移到容量瓶中,然后向容量瓶中直接加水稀释到刻度线

D.配制溶液时容量瓶中原来有少量蒸馏水不会影响实验结果

答案

答案:D

考查溶液的配制

A:溶于1升水中是错误的,应溶于水中配成一升溶液

B:固体一般放在纸片上

C:溶解后洗涤烧杯二至三次,一并移至容量瓶中,加水稀释到离刻度线2至3cm时,改用胶头滴管定容,不正确

D:正确

答案为D

单项选择题 A1/A2型题
完形填空

完形填空(共20小题;每小题1.5分, 满分30分)

阅读下面短文, 掌握其大意, 然后从36--55各题所给的四个选项(A、B、C和D)中, 选出最佳选项。

Keeping a Diary in English

Our teacher asks us to keep a diary in English. I   36   doing so because I think keeping a diary in English is one of the effective ways to   37   our English writing ability.

Compared with   38   forms of writing, it is shorter and   39   less time. It can help us to   40   the habit of thinking in English.  41   we persist in(坚持) this practice, gradually we’ll learn how to express ourselves in English. In keeping a diary in English,   42   can use the important phrases and sentences we’ve   43   in or out of English classes to describe our   44  , and this way we can master and use freely   45   we’ve learned, which will do good  46  us in English learning. But   47   we certainly run up against many difficulties. In the first place, it often happens that we have   48   finding proper words and phrases to give expression to our mind. Secondly, there   49   many idiomatic (惯用的) ways of saying things in Chinese. And it is extremely hard   50   us to put them into English properly.

As far as I am concerned, my suggestion is that we   51   always have a notebook and a Chinese-English dictionary within easy reach. Whenever   52   beats(难倒) us, we can first put it down in our notebook and then look it up in our dictionary. We can also turn to our English teacher for   53  , if necessary.

In short, I believe that it is of   54   use to keep a diary in English for the development of our   55   skills.

36. A. imagine        B. can’t stand        C. enjoy         D. finish

37. A. get            B. gain          C. improve        D. prove

38. A. other          B. the other      C. another       D. others

39. A. spends         B. takes     C. pays                 D. spares

40. A. develop        B. make         C. give up                 D. pick

41. A. Before         B. After    C. If                     D. While

42. A. they           B. he             C. she                   D. we

43. A. learned        B. forgotten     C. thought               D. listened

44. A. eyes          B. books    C. texts                  D. feelings

45. A. that          B. which     C. what                  D. when

46. A. to            B. across          C. between             D. along

47. A. at a time      B. at one time           C. all the time             D. at times

48. A. trouble       B. difficulties       C. chance               D. choice

49. A. is            B. has         C. are                  D. have

50. A. of            B. for          C. at                     D. on

51. A. can           B. shall      C. may          D. should

52. A. nothing       B. something       C. somebody     D. anybody

53. A. money        B. dictionary      C. question               D. help

54. A. great          B. much   C. very          D. more

55. A. speaking        B. writing         C. listening       D. reading