腰椎间盘突出症
参考答案：
是因腰椎间盘退行性变，椎间盘膨出，纤维环破裂，髓核向后突出，刺激和压迫脊神经或脊髓，产生以根性坐骨神经痛为主要症状的腰腿痛。
He found his uncle the reading of a workers newspaper.
A．absorbing
B．absorbed
C．buried
D．absorbed in
A．mgtgθ
B．mgsinθ
C．μmg
D．μmg
mgtgθ
mgsinθ