全身骨与关节结核中发病率最高的是（）。
A.肘关节结核
B.髋关节结核
C.脊柱结核
D.膝关节结核
E.肩关节结核
参考答案：C
He got completely when he saw both Lucy and Lily, who are twin sisters.
A．confusing
B．confused
C．confuse
D．confuses
