能固定宫颈,并保持子宫不向下脱垂的主要结构为
A.圆韧带B.阔韧带C.主韧带D.骶骨韧带E.骨盆漏斗韧带
参考答案:C
A (72) is a data communication system that allows a number of independent devices to communications directly with each other in a limited geographic are
A.A. LANB. WANC. InternetD. Ethernet
CIS的基本特征不包括().
A、综合性
B、多学科
C、理论性
D、实践性