On the icy road surface, the friction of the road surface will decrease, so when braking, the car will slide for a longer time than when there is no ice and snow on the road surface.
(2) When heated for the same time, the greater the temperature change, the smaller the specific heat capacity. It can be seen from the image that the temperature of the ice with higher salt concentration changes the most at the initial stage of heating, so the specific heat capacity of the ice with higher salt concentration is the smallest.
It can also be seen from the figure that the higher the salt concentration, the lower the melting point of ice, so the faster the temperature rises before melting, and the heat can reach the melting point and begin to melt in a short time, that is, the substance can melt at a lower temperature.
So the answer is: inertia; Small; Dragon; Small; Fast; Low.