哪些不是髓外硬膜下肿瘤(如图所示)的特点()
A.分离性感觉障碍
B.脊髓半侧损害综合征
C.感觉和运动障碍自上而下发展
D.感觉和运动障碍自下而上发展
E.根性疼痛
参考答案:A, C
The look on his face suggested that he that. [ ]
A. puzzling ; hasn't expected
B. puzzled ; hadn't expected
C. puzzling ; doesn't expect
D. puzzled ; didn't expect
高温过热器管的监视段的割管检查,应在每次大修时才进行检查。