(2013? Xiangtan) as shown in the figure, the aircraft wing model standing still in the electronic scale, when using an electric fan blowing against the model, the electronic scale shows more than not.

When using an electric fan against the model when blowing, because the model above the raised, below the flat, so the upper surface of the air flow rate, pressure is small, below the table air flow rate is slow, the pressure is large, the formation of an upward pressure difference, so that the scale shows a decrease in the number. The greater the wind speed, the greater the flow of air, the smaller the scale.

The answer is: small; large; large.

The answer is: small; large; large.