1.PA=GA/SA=60/0.1^2=6000Pa2.ρA/ρB=mA*VB/(mB*VA)=83.设截去H后压强相等 PA=[(0.1-H)/0.1]*GA/SA PB=[(0.2-H)/0.2]*GB/SB PA=PB代入数字可解可得：H=3/35m.
