_____ of the good results of the exam, the teacher felt very happy.

A．informed

B．told

C．acknowledged

D．convinced

骨显像用于骨良性疾病的临床应用，下列错误的是（）

A.关节炎

B.感染

C.代谢性疾病

D.骨折是否愈合

E.骨髓炎