( )of the Earth's surface sovers with water ,the salt water take up 97.5%,fresh water only 2.5%
问题描述：
( )of the Earth's surface sovers with water ,the salt water take up 97.5%,fresh water only 2.5%
a.1/4 b.3/4 c.9/10
答
b.答案是 3/4
(3/4) of the Earth's surface is covered with water,salt water takes up 97.5%,fresh water only 2.5%
地球的表面4分之3覆盖着水,咸水占 97.5%,新鲜水只有 2.5 %