运动神经元病是一组病因为未明的选择性侵犯
A．锥体束
B．脊髓侧角细胞
C．脊髓前角细胞
D．皮质锥体细胞
E．脑干后组运动神经元
参考答案：A,C,D,E
---Do you still smoke heavily?
--- No. In fact, it is two years since I ____.
A. have stopped smoking B. smoked
D. began to smoke D. started to smoke
与心身疾病关系最密切的是（）。
A.吸烟
B.酗酒
C.吸毒
D.不洁性行为
E.工作紧张
