—Do you know Tsering Danzhou, a ten-year-old boy in Yushu?        

—Yes. He           the people his great help as a translator after the earthquake.        [ ]

A. provided    

B. supported    

C. offered  

D. afforded

放射性核素全身骨骼闪烁显像，骨转移瘤最常见的主要特征是()

A．孤立的骨异常放射性增高区

B．随机多发性放射性稀疏缺损区

C．炸面圈样影像

D．随机多发形态不一的放射性增高病灶

E．以上都不是