男性,18岁,自幼反复关节腔出血,关节肿胀变形,查血常规三系正常,PCT缩短、APT、CT延长。有家族史。患者患病是因为缺乏()
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
免费的网站请分享给朋友吧