0.034X0.5X0.6用简便方法=0.034x(0.5x0.6)=0.034x0.3=0.0102
0.034X0.5X0.6=0.034x(0.5x0.6)=0.034x0.3=0.0102
0.034X0.5X0.6=0.034x(0.5x0.6)=0.034x0.3=0.0102