着床必须具备的条件不包括 A．松驰素的分泌 B．透明带必须消失 C．孕激素的大量分泌

第二节：完形填空（共20小题；每小题1.5分，满分30分）

请认真阅读下面短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

Square dancing is an American 36. It originated in America, during the California Gold Rush. Having been a 37 folk tradition since 1651, it 38 out of various traditional dances from around the world. In those days, men and women worked in groups to 39 a house or harvest crops. 40 the work was done, they usually 41 merrily and happily in a store or in a farm kitchen.

In this dance eight people work 42 a team, called a 43, to successfully complete a set of complex dance figures that are delivered by a caller, who calls out the movements. Four couples stand 44 the center of the square, each couple standing on one side of the square, the boy on the left and the girl on the 45.

Large or small numbers of people can dance 46. Sometimes 800 or 1,000 people may be dancing at the same time. 47 there may be only one square of 48 people.

Costumes are worn by those who square-dance. This makes the dancing more 49 to watch. 50 often wear full skirts of various colors with a pretty blouse. Men may have coloured shirts and western trousers, which they wear only when square-dancing. In some country areas, everyone wears his 51 clothes.

Square dancing 52 exists today, ever since President Ronald Reagan signed an Act of Congress in 1982 making square dancing the 53 Folk Dance of America. Many 54 teach square dancing in Physical Education, and there are actually square dance competitions. In all parts of the United States you will find some schools, clubs, or other groups that are square dancing for 55.

36. A. activity               B. fun                          C. pastime                    D. joy

37. A. popular               B. special                            C. common                   D. welcome

38. A. went                   B. grew                        C. developed                 D. took

39. A. build                  B. set                           C. buy                          D. fix

40. A. While                 B. Since                       C. When                       D. Before

41. A. say                        B. danced                            C. gathered                   D. stayed

42. A. like                    B. for                           C. as                               D. on

43. A. square                B. dance                       C. tradition                   D. job

44. A. walking                     B. watching                  C. surrounding                 D. facing

45. A. right                   B. centre                      C. left                          D. side

46. A. at a time                B. at one time               C. for a time                 D. at any time

47. A. And                    B. Or                           C. Then                        D. However

48. A. 4                        B. 800                          C. 8                             D. 1

49. A. interesting           B. colourful                  C. important                 D. amazing

50. A. Women               B. Men                         C. People                            D. Dancers

51. A. ordinary                B. nice                         C. best                         D. new

52. A. already               B. ever                         C. yet                           D. still

53. A. National             B. International             C. Common                  D. traditional

54. A. clubs                  B. schools                     C. countries                  D. groups

55. A. free                    B. sale                          C. interest                     D. fun

胎儿一手脱出 * * ，能与检查者右手相握，胎头位于母体腹部左侧，其胎位是（）

A.肩左前

B.肩左后

C.肩右前

D.肩右后

E.肩左横

下列关于荧光的说法不正确的是( )。

A．是某些物质受紫外光或可见光照射后发出的
B．荧光的能量大于激发光的能量
C．荧光的波长长于激发光
D．荧光的平均寿命很短
E．除去激发光源，荧光立即熄灭

子宫肌瘤最常见的并发症是（）

A.红色变性

B.继发性贫血

C.浆膜下肌瘤蒂扭转

D.肌瘤压迫输尿管引起肾盂积水

E.肌瘤恶变