— Would you like me to do some shopping for you? 

— That's very kind of you for your ____. [ ]

A. offer

B. service

C. point

D. suggestion

两种药物合用，能产生或增强毒性。这种配伍关系是( )

A．相使

B．相畏

C．相反

D．相恶

E．相杀