The library is across the office. [ ]
A. in
B. from
C. on
答案：B
Bolton点是（）
A.枕骨髁突后切迹的最凹点
B.硬腭后部骨棘之尖
C.髁突的最上点
D.颅底下缘与下颌髁突颈后缘之交点
E.上齿槽突之最前下点
