延髓外侧综合征又称小脑下后动脉综合征，常见于（）动脉闭塞或部分梗死所致。
参考答案：小脑下后
对增生性脊柱炎描述，错误的是（）
A.顽固性腰背痛，晨起更重
B.平卧可缓解疼痛
C.好发于50岁以上年龄
D.局部常有压痛
E.又称退行性脊柱炎
When we saw the film "Hero". I sat between Jim and Mary. That is to say, my seat was between ______. [ ]
A. Jim and Mary
B. Jim's and Mary
C. Jim and Mary's
D. Jim's and Mary's
