---- They say Philip’s brother is a billionaire.

---- ____________? He wouldn’t accept any help from his brother, even if it were offered.

A．What if

B．What for

C．So what

D．Forget it

异烟肼与维生素B₆合用可( )

A．增强疗效
B．降低疗效
C．减少副作用
D．延缓耐药性的发生
E．毒性增加