The transistor works in the amplifying state. The measurement results are shown in the figure. If the transistor is made of the material of 锗 , |VB-VE|=0.3V. If the transistor is made of the material silicon, |VB-VE|=0.7V.We can arrage the voltages of the three potentials in descending order:(-1.3V)----(-2V)----(-10V), then we get the differences of two voltages of the three voltages, we can find if the absolute value of a difference is 0.7V, so it is made of silicon material. If the absolute value of the difference is equal to 0.3V or 0.2V, it is made of silicon. The rest pole is C pole. If VC>VB>VE, it is NPN transistor, if VC