(20 1 1? South China Sea Simulation) Read the following article. There is freezing rain and heavy rain in southern China. In early winter or late winter, sometimes there is a strange phenomenon: from

(1) Snowflakes falling from the ice crystal layer melt into raindrops when passing through the warm layer, and then enter the cold air layer near the ground, and the raindrops quickly cool down. Although they haven't come and turned into ice, the temperature has dropped below 0℃, forming supercooled raindrops, that is, "freezing rain". When freezing rain touches cold objects on the ground, it freezes immediately and becomes what we see as "rain".

So, the answer is: b; d； A.

(2) According to the materials, "when freezing rain touches cold objects on the ground, it freezes immediately and becomes what we see as a' rainstorm', indicating that this is a solidification process and heat should be released.

(3)A, install a snow chain for the automobile, and increase the friction by increasing the roughness of the contact surface under the condition of constant pressure;

B, wear a layer of straw sandals on the outside of the pad, which is to increase the friction by increasing the roughness of the contact surface under the condition of constant pressure;

C. In order to melt the hard ice on the road faster, sprinkling salt on the ice becomes an effective auxiliary means, mainly because the melting point of ice can be reduced after mixing salt with ice, and the phenomenon of "freezing at night and melting at day" can be avoided.

D, spread a layer of grass mat on the ice and snow pavement, which is to increase the friction by increasing the roughness of the contact surface under the condition of constant pressure.

To sum up, what distinguishes it from other methods is C.

So choose C.