慢性骨髓炎迁延不愈、反复发作的最主要原因是()
A.窦道的形成
B.死骨的残留
C.瘢痕组织增生
D.机体抵抗力低
E.细菌毒力太强
参考答案:B
You are supposed __ when you meet someone for the first time.
A. shake hands
B. to shake hands
C. shaking hands
Which sport has the most expense training equipment,players’ personal equipment and uniform?[ ]
A.in terms of
B.in relation to
C.by way of
D.in case of