____ the flight to Beijing will be delayed is ____ I’m especially worried about.

A．If; what

B．Whether; that

C．When; that

D．Whether; what

古阿拉伯时期的重要医德文献是(　　)

A．赫尔辛基宣言

B．迈蒙尼提斯祷文

C．希波克拉底誓言

D．妙文集

E．胡弗兰德十二箴言