男，21岁，发热，左上肢剧痛半月余，结合影像学检查，最可能的诊断是（）
A.骨肉瘤
B.骨样骨瘤
C.骨结核
D.骨巨细胞瘤
E.骨髓炎
参考答案：E
--- Look! Everything here is under construction.
--- What’s the pretty small house that _______ for?
A．is building
B．is being built
C．is built
D．had been built
电机车架空线的悬挂高度是怎样规定的？其依据和目的是什么？
