脊髓灰质背侧柱（角）的神经元是（）
A.感觉神经元
B.运动神经元
C.中间神经元
D.植物性神经元
E.传出神经元
参考答案：C
Tom never does his homework Mary. He always makes lots of mistakes.
A. as carefully as B. carefully as C. as careful as
23岁，男，左侧胸壁刺伤3小时，呼吸窘迫，请结合胸片检查选出最可能的诊断()
A．肺气肿
B．气胸
C．纵隔气肿
D．肺挫伤
E．胸腔积液
