提示血容量相对过多（） A.中心静脉压低，血压低 B.中心静脉压高，血压低

强直性脊柱炎

A．脊椎呈“竹节”样
B．骨膜反应呈三角形
C．骨端膨胀呈肥皂泡样
D．长管骨干骺区有骨性疣状突起
E．有死骨形成并有包壳 请指出下列疾病的特征性X线片变化

.

Ⅱ. 完形填空（共20小题，计20分）

In the past, most American mothers were at home to take care of their children during the day. Now, __36__, many mothers are working. More than half of the American women __37__ young children have __38__ outside the house.

American families settle the child care __39__ in different ways. Some parents permit __40__ children to stay home alone after school. The parents __41__ be sure the children, usually not younger than 10 years old, understand __42__ rules and can deal with emergencies (紧急情况). Other parents say they would __43__ permit their children to be at home alone. They usually __44___someone to take care of the __45__.

Some parents in the U.S. find their own way to __46__ the cost of child care in__47__.  Each person in one group __48__for the children of other group __49__ at different times. Some parents ask local__50__, schools and social organizations to help __51__ activities for the children. These child care choices often cost __52__ or no money. Many American parents, however, still __53__ with the problem of __54__ good child care at a __55___ price.

36.   A. therefore           B. otherwise            C. thus                   D. however

37.   A. like              B. as                       C. with              D. from

38.   A. children           B. jobs                        C. houses               D. money

39.   A. problem            B. question                   C. chance                     D. choice

40.   A. older              B. younger                   C. sicker           D. happier

41.   A. can               B. must                   C. may               D. ought

42.   A. dangerous      B. safety                       C. funny                D. true

43.   A. rather               B. certainly                   C. always              D. never

44.   A. send             B. stop                       C. pay                D. invite

45.   A. house             B. neighbors                 C. old              D. children

46.   A. protect           B. end                    C. reduce       D. increase

47.   A. schools             B. groups                     C. clubs         D. hospitals

48.   A. cares             B. sends                  C. asks             D. pays

49.   A. strangers           B. members                  C. officials       D. teachers

50.   A. shops            B. members                 C. churches       D. restaurants

51.   A. equip            B. offer                       C. play                  D. join

52.   A. much                      B. little                        C. enough             D. more

53.   A. enjoy                      B. discuss                     C. quarrel         D. struggle

54.   A. taking            B. finding                    C. losing           D. suffering

55.   A. high               B. low                   C. reasonable         D. real

缓解心绞痛作用最快的药物是

A．硝酸异山梨醇酯 

B．硝苯地平 

C．麝香保心丸 

D．冠心苏合丸 

E．硝酸甘油 

自律性最高的是（）

A．窦房结

B．房室结

C．房室交界

D．浦肯野纤维

E．心室肌