北京市位于我国的：（） A．北方地区 B．南方地区 C．西北地区 D．青藏地区

女性，25岁。左膝外上方逐渐隆起包块伴酸痛半年，X线平片提示左股骨下端外侧有一病灶，边缘膨胀，中央有肥皂泡样改变，无明显的骨膜反应。以下准备采用的治疗方案中，不恰当的是（）

A.病灶刮除骨水泥填塞

B.病段骨切除，胫骨翻转植骨膝关节融合

C.病段骨切除，同种异体半关节移植术

D.病段骨切除，带血管骨移植

E.股骨中上1／3截肢，安装假肢

有固定组织形式的国际商品市场，主要包括（）

A.商品交易所

B.博览会

C.展销会

D.租赁贸易

E.拍卖

不良反应有肾脏损害的是（）

A、头孢菌素类

B、四环素类

C、两者均是

D、两者均不是

Another critical factor that plays a part in susceptibility to colds is age. A study done by the University of Michigan School of Public Health revealed particulars that seem to hold true for the general population. Infants are the most cold-ridden group, averaging more than six colds in their first year. Boys have more colds than girls up to age three. After the age of three, girls are more susceptible than boys, and teenage girls average three colds a year to boys’ two.
The general incidence of colds continues to decline into maturity. Elderly people who are in good health have as few as one or two colds annually. One exception is found among people in their twenties, especially women, who show a rise in cold infections, because people in this age group are most likely to have young children. Adults who delay having children until their thirties and forties experience the same sudden increase in cold infections.
The study also found that economics plays an important role. As income increases, the frequency at which colds are reported in the family decreases. Families with the lowest income suffer about a third more colds than families at the upper end. Lower income generally forces people to live in more cramped quarters than those typically occupied by wealthier people, and crowding increases the opportunities for the cold virus to travel from person to person. Low income may also adversely influence diet. The degree to which poor nutrition affects susceptibility to colds is not yet clearly established, but an inadequate diet is suspected of lowering resistance generally.

The word "cramped" underlined in Paragraph 3 most probably means ______ .

A．cheap
B．crowded
C．depressing
D．simple

膝关节前脱位最常并发的韧带损伤为（）

A.内侧副韧带断裂

B.外侧副韧带断裂

C.后交叉韧带断裂

D.前交叉韧带断裂

E.以上都不是