铅管样肌张力增高常见于__________，折刀样肌张力增高常见于__________。
参考答案：帕金森病、上运动神经元瘫痪
His parents were teachers in that school, _______ lost their lives in order to save
their students in the earthquake.
A．none of them
B．both of them
C．none of whom
D．both of whom
简述竞争与垄断的关系。
