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
France has reported a second case of a new type of virus infection. The virus is similar to ______ that caused SARS, a breathing disease that killed 775 people in 2003.
A．ones
B．those
C．one
D．the one
天然纤维纺织面料包括：（）（）（）和（）四种
