During winter in cold countries, the ____ is mixed to melt the ice on the icy roads.
A. Salt
B. Chlorine
C. Carbon dioxide
D. Water
A. Salt
B. Chlorine
C. Carbon dioxide
D. Water
A. River water
B. Canal water
C. Sea water
D. Water in a lake
A. 5
B. 6
C. 7
D. 8
A. Sound cannot travel through a vaccum
B. Sound cannot travel through gases
C. Sound cannot travel through liquids
D. Sound cannot travel through solids