Digeorge综合征重要免疫学特征是
A.血清Ig水平降低
B.B细胞缺失
C.T细胞缺失
D.补体系统缺陷
E.吞噬细胞功能异常
参考答案:C
______I went to Guiling,I was fascinated by its natural scenery.
A.The first time
B.At first
C.At the first time
D.For the first time
脊髓硬膜外压迫性病变的特点是()
A.以神经鞘瘤多见,表现为根痛一脊髓半横断一脊髓全横断损伤过程
B.以血管畸形多见,表现为脊髓蛛网膜下隙出血
C.以室管膜瘤多见,表现为分离性感觉障碍
D.以转移瘤多见,早期局部疼痛显著,脊髓受压症状出现相对较晚
E.以炎症多见,急性期表现为脊髓休克