温度不变时,气体的体积(V)与压强(P)的关系是 ( )

A、V_{1<\/sub>\/V2<\/sub>=P2<\/sub>\/P1 <\/sub>
B、V1<\/sub>\/V2<\/sub>=P1<\/sub>\/P2 <\/sub>
C、V1<\/sub>= K*V2<\/sub>P1<\/sub>\/P2 <\/sub>
D、V1<\/sub>=K*V2<\/sub>P2<\/sub>\/P1<\/sub>}