交感神经的低级中枢位于脊髓的（）
A.颈1-胸3节
B.胸1-腰3节
C.腰1-骶2节
D.骶2-4节
E.仅存在于中胸节
参考答案：B
非自动闭塞，出站信号机两个绿色灯光准许列车由车站出发，开往（）。
She was _______whether to follow her husband to go abroad or to stay at home to look after her parents.
A．taken between
B．taken up
C．taken off
D．taken away
