Question

【04湖南文】設(shè)集合U={(x,y)|x∈R,y∈R}, A={(x,y)|2x-y+m>0}, B={(x,y)|x+y-n≤0},

那么點(diǎn)P（2，3）的充要條件是

A．        B．

C．              D．

Answer 1

A