A:①②
B:①④
C:②③
D:③④
一定量的理想气体从状态a开始,经历三个过程ab、bc、ca回到原状态,其p﹣T图象如图所示,下列判断正确的是( )
①Mary where nine play football three friends a thin boy
②Who is she,Mary? She's your grandmother.