精髓空虚致痛的表现是（）
A.灼痛
B.窜痛
C.绞痛
D.空痛
E.酸痛
参考答案：D
—_____ your mother go fishing?
—No, she didn't. She went shopping.[ ]
A. Does
B. Is
C. Did
D. Do
颅底陷入症是指以枕骨大孔为中心的颅底骨组织内翻，寰椎、枢椎齿状突等上颈椎结构陷入颅内，致使颅后窝容积缩小和枕骨大孔前后径缩短而产生症状。()
