My teacher has never lost his temper; that is to say, he is a _____ man.   [ ]

A. generous            

B. mild              

C. rude              

D. tough

关于人体实验的国际性著名文件是（）

A.《夏威夷宣言》

B.《赫尔辛基宣言》

C.《希波克拉底誓言》

D.《东京宣言》

E.《悉尼宣言》