Those units provide a means of preventing it from freezing.
A.Those units means that they can prevent it from eroding. B.Those units provide a method of deicing. C.Those units provide a way to prevent the formation of ice.正确答案C
Those units provide a means of preventing it from freezing.
A.Those units means that they can prevent it from eroding. B.Those units provide a method of deicing. C.Those units provide a way to prevent the formation of ice.正确答案C