关于强直性脊柱炎早期X线征象中,下列错误的是()
A.椎体上、下缘限局性骨质破坏
B.椎体前缘骨质硬化,出现方椎
C.椎旁韧带骨化
D.脊柱骨质疏松
E.关节骨性强直
参考答案:E
Kathy, _________ for months to find a job as a typist, finally took a _________ at a local travel agency.
A.struggling, condition
B.struggling, position
C.having struggled, position
D.struggled, condition
培养百日咳鲍特菌的鲍-金培养基含有大量下列哪种物质()
A.氯化钠
B.氰化物
C.万古霉素
D.血液
E.蛋白胨