标准状况下，32 g某气体的分子数与9 gH₂O的分子数相同，该气体的摩尔质量为

A．32

B．32 g·mol^-1

C．64 g·mol^-1

D．64

----_______are you going to______ it?

---- Keep it, of course.

A．What, deal with

B．How, deal with

C．How, do with

D．What, use