[名词解释] 移行期

强直性脊椎炎的临床表现是() ["A．可有家族史","B．发病年龄多小于40岁","C．有晨僵表现","D．脊柱活动度受限","E．症状反复发作，逐渐加重"] 流行性出血热 Hantavirus 结肠钡灌肠有下列哪些检查方法() ["A．无管法","B．传统常规法","C．插管法","D．双重造影法","E．以上都不是"] 尿膜状物 移行期