______I know him, ______I hardly talk to him.

A．Although; but

B．Although; /

C．/; Although

D．But; although

鼻咽癌病人（）

A.血酸性磷酸酶升高 

B.血酸性糖蛋白升高 

C.血CEA升高 

D.血AFP升高 

E.血VCA—IgA抗体升高