下列哪些基牙能作为圆锥型套筒冠义齿的基牙（） A.锥型牙冠 B.龋病死髓牙 C.大面

下述情况何者属于分析人员不应有的操作误差（）？

A.滴定前用标准溶液将滴定管淋洗几遍

B.称量用砝码没有检定

C.称量时未等称量物冷却至室温就进行称量

D.所用滴定管没有校正值

下列有关溶液的叙述正确的是（  ）

A．稀溶液一定是不饱和溶液

B．饱和溶液就是不能再溶解任何物质的溶液

C．溶质的溶解度都随着温度的升高而增大

D．溶质在溶解过程中，有的放出热量，有的吸收热量

把一根枝条的顶尖掐掉，这根枝条就不能继续向上生长，是因为枝条的顶尖中有（　　）

A．保护组织

B．营养组织

C．输导组织

D．分生组织

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, 并在答题卡上将该项涂黑。

One windy spring day, I observed young people having fun using the wind to fly their kites. Multicolored creations of varying shapes and sizes   36  the skies like beautiful birds dancing. As the strong winds blew against the kites, a string kept them under   37 .

Instead of blowing away with the wind, they arose against it to achieve great   38 . They __39  and pulled, but the restraining string and the clumsy tail kept them in tow (拖着), facing upward and against the   40 . As the kites struggled and trembled against the string, they seemed to say, “Let me go! Let me go! I want to be   41  !” They flew beautifully even   42  they fought the restraint of the string. Finally, one of the kites succeeded in getting   43  . “Free at last,” it seemed to say. “Free to fly   44  the wind.”

Yet freedom from restraint simply put it at the   45  of an unsympathetic wind. It flew up and down to the ground and   46  in a mass of weeds and string against a dead bush. “Free at last”, free to lie powerless in the dirt, to be blown   47  along the ground.

How much like   48  we sometimes are. The heaven gives us adversity (逆境) and restrictions,   49  to follow from which we can grow and  50  strength. Some of us resist the rules so hard that we never fly to reach the heights we might have   51 . We keep part of the rules and never   52  high enough to get our tails off the ground.

Let us each rise to the great heights,   53  that some of the restraints that we may be annoyed at are   54  the powerful force that helps us climb and   55  our goal.

36. A. surrounded          B. covered             C. emptied                    D. filled

37. A. construction        B. discussion         C. control                       D. pressure

38. A. heights                B. lengths              C. widths                         D. weights

39. A. crashed               B. shook                C. floated                      D. landed

40. A. rain                     B. sun                   C. wind                         D. storm

41. A. energetic             B. lonely                C. safe                          D. free

42. A. before                 B. as                     C. since                        D. after

43. A. crazy                  B. upset                 C. loose                         D. happy

44. A. with                   B. against              C. beneath                  D. over

45. A. edge                  B. expense             C. mercy                     D. bottom

46. A. fled                    B. hid                    C. existed                       D. landed

47. A. deliberately          B. helplessly           C. actively                    D. hopefully

48. A. strings                B. kites                  C. bushes                       D. weeds

49.A. rules                   B. customs             C. wishes                     D. instructions

50. A. convey               B. consume          C. lose                       D. gain

51. A. contained            B. lowered             C. indicated                 D. obtained

52. A. rise                     B. rank                  C. kick                         D. jump

53. A. hoping                B. supposing          C. recognizing              D. dreaming

54. A. strictly               B. actually             C. hardly                     D. consequently

55. A. achieve               B. score                C. miss                      D. set

应用降压药治疗高血压病，下列原则中哪一条是错误的（）

A.血压显著增高已多年的病人，应尽快使血压降至正常水平

B.单个药物小剂量开始，逐渐加量，必要时可联合用药

C.血压下降并稳定正常后.改为维持量长期用药

D.坚持个体化用药

E.发生高血压危象时要紧急降压