骨转移瘤骨显像中哪种表现宜用放射性核素治疗()
A.放射性减低区
B.放射性增高区
C.放射性分布正常
D.放射性缺损区
E.有"轮圈征"出现
参考答案:B
The girl _____ leg was broken in the earthquake was taken to the hospital.
A.who
B.that
C.which
D.whose
组合架零层JZ熔断器有什么作用?