5、地球表面的重力加速度为g，半径为R，万有引力恒量为G，可以用下面哪个式子来估

完形填空（20分）

Not so long ago, if you avoided drinking water during a workout（训练）, you were considered tough. Today, most experts     36   , you would be considered unintelligent.

Even in you don’t sweat much or feel    37   and even if there is a nice breeze,    38     experts say drinking water- or something    39   is necessary before, during and after all warmer-weather   40  .

Only a few years ago, many coaches   41   players from drinking anything during the game----they thought it was   42   for them to rinse(漱口) their mouths,   43  swallowing anything might slow them down.

Now, there’s   44   plenty of water on the sidelines for athletes to drink. The National Hockey League even   45   goalkeepers to put water bottles on top of their nets.

These new practices   46  be lost on the recreation(消遣) athlete. Some   47  advise you to drink about two cups of water 15 minutes or so after you   48  exercising and the same amount every 15 minutes. In some types of exercises-running, for example-others encourage drinking a cup or two of water   49  the workout.

Don’t drink any more, experts say too much fluid makes   50 and exercise uncomfortable. In   51   continuous hot-weather exercise,   52   can sweat and breathe away 1.8 kilograms of   53   an hour.

Drinking water does two things: restore some   54   and allow you to keep sweating so the skin can be kept  55  . Doctors say drinking six or eight cups a day can help digestion.

36. A. discover                     B. suggest                     C. agree                       D. fear

37. A. thirsty                       B. hungry                     C. hot                          D. tired

38. A. labour                       B. children                   C. water                       D. exercise

39. A. else                          B. instead                           C. fresh                        D. tasteful

40. A. seasons                     B. lessons                     C. days                         D. activities

41. A. excused                           B. discouraged                    C. prevented                 D. saved

42. A. possible                           B. unnecessary              C. difficult                   D. right

43. A. but                                  B. then                         C. therefore                  D. though

44. A. seldom                     B. forever                     C. usually                     D. sometimes

45. A. allows                      B. promises                  C. forbids                     D. guides

46. A. couldn’t                           B. wouldn’t                  C. shouldn’t                  D. mustn’t

47. A. teachers                           B. parents                     C. players                     D. doctors

48. A. stop                           B. start                         C. give up                    D. begin with

49. A. after                          B. before                     C. with                         D. from

50. A. walking                           B. breathing                  C. swallowing              D. drinking

51. A. heavy                        B. easy                         C. pleasant                    D. everyday

52. A. a patient                    B. a drinker                  C. an athlete                 D. an expert

53. A. air                            B. atmosphere              C. oxygen                     D. water

54. A. sweat                         B. weight                           C. breath                     D. height

55. A. warm                        B. strong                     C. cool                         D. safe

（）是指计算机系统中具有记忆能力的部件，用来存放程序和数据.

A.运算器

B.控制器

C.存储器

D.输入/输出设备

(二)
某城市道路工程项目，施工图设计中要求基层采用石灰粉煤灰稳定砂砾，面层采用沥青混合料施工。
在基层施工过程中的一些情况如下：
(1)选用的粉煤灰中SiO₂、Al₂O₃和Fe₂O₃的总含量为60%。
(2)通过配合比试验确定相关的指标。
(3)混合料拌成后的平均堆放时间为30h。
(4)拌成后的混合料的含水量略小于最佳含水量。
沥青混合料面层施工严格按行业标准CJJ 1的规定对其质量进行控制。
某段道路的施工正赶上季节性的雨期。
问题

对石灰粉煤灰砂砾基层质量控制的主要项目有哪些

有些课题主要包含高度有结构的知识和技能（如数学、物理、化学、计算、语法等），如果教学目标是要求学生尽快地掌握这种知识和技能，则宜于采用（）

A.以教师为中心的讲授策略

B.师生互动策略

C.以学生为中心的发现学习

D.合作学习策略

下图为甲病（B—b）和乙病（A—a）两种遗传病的家族系谱图，其中Ⅱ-3号不含甲病致病基因。请回答：

写出下列个体可能的基因型。Ⅰ2（），Ⅲ9（），Ⅲ11（）