Cuiming Lake in Yinchuan City is a national wetland park, which has many functions such as water conservation and climate regulation. (1) Wetland is rich in water. With the increase of wetland area,

(1) Because of the large specific heat capacity of water, it absorbs or releases the same heat (under the same sunshine condition), the temperature of wetland changes little and that of dry land changes greatly, thus playing a role in regulating the temperature.

(2)

Let the density of cardboard be H and the density of "map" be ①.

Similarly, the density of the sample ②; (1) (2) Synchronous type, available

The actual area of wetland.