急性脊髓炎和脊髓压迫症的鉴别诊断最有价值的是（）
A.起病急缓
B.症状的轻重
C.有无脊髓休克
D.脑脊液的改变
E.腰穿时压颈试验通畅
参考答案：E
— The child is said to have _____ gift for teaching deaf children.
— She's something. I think it calls for _____ patience and imagination.
[ ]
A. a; the
B. the; the
C. a, /
D. /; a
数据中存在单向邻区关系可能会带来哪些不良后果？
