The 16th Asian Games were held in ____ city of Guangzhou, ____ international big city in the south of

China in November. [ ]

A. a; an

B. the; an

C. a; the

D. the; the

医学科研道德的根本原则是（）

A.献身医学

B.造福人类

C.团结同道

D.合理保密

E.严谨治学