η = 1 - exp(-AW/Q)
0.98=1-exp(-AW/Q1),0.02=exp(-AW/Q1),ln0.02=-AW/Q1=-3.91,AW=3.91Q1
0..94=1-exp(-AW/Q2),0.06=exp(-AW/Q2),ln0.06=-AW/Q2=-2.81,AW=2.81Q2
带入AW值,可以得到Q1/Q2=2.81/3.91=0.72
104年專B已考過