诊断早期骨软骨缺血坏死最为敏感的检查方法是（）
A.MRI检查
B.X线平片
C.CT平扫
D.CT增强扫描
E.临床体检
参考答案：A
This is the only answer _______right.[ ]
A. which we think is
B. what we think is
C. that we think is
D. what we think it is
刚性路面纵、横缝之间以相互（）为宜，当一次摊铺宽度大于4.5m时，增设纵向（）缝。
