In march,2008, Medvedev was elected _______ president of Russia­­­­—________ position he will hold for 6 years.

A．a; a

B．不填；a

C．the; a

D．the; the

与华法林竞争血浆蛋白结合的药物是：

A．非那西丁

B．吲哚美辛

C．对乙酰氨基酚

D．以上都不是

E．保泰松