Last week our subject was illegal fishing. Now we report on two cases ______ fish are both the

victims and the offenders.[      ]

A. how    

B. that            

C. when        

D. where

关节结核多继发于（）

A.肺结核

B.胸膜结核

C.淋巴结核

D.肠结核

E.以上均是