肛门旁皮下脓肿切开时应采取什么切口( )
A.平行纵切开
B.放射状
C.梭形
D.弧形
E.十字形
参考答案:B
A strong earthquake hit Japan on March 11, _____ thousands of people homeless. [ ]
A. to leave
B. having left
C. left
D. leaving
是反映成骨细胞活动状态的敏感指标。与骨形成呈正相关。老年性骨质疏松症时变化不显著"的项目为()
A.骨钙素(BGP)
B.尿羟脯氨酸(HOP)
C.尿羟赖氨酸糖苷(HOLG)
D.碱性磷酸酶同工酶(AKP)
E.血清Ⅰ型前胶原羧基端前肽(PICP)