試題詳解

49. According to the passage, which of the following is true about the effects of salts on rocks?
(A) Only two types of salts cause prying and wedging.
(B) Salts usually cause damage only in combination with ice.
(C) A variety of salts in all kinds of environments can cause weathering.
(D) Salt damage at the seashore is more severe than salt damage in Death Valley,