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覆蓋著水,咸水占 97.5%,新鮮水只有 2.5 %
( )of the Earth's surface sovers with water ,the salt water take up 97.5%,fresh water only 2.5%
( )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
a.1/4 b.3/4 c.9/10
英語人氣：959 ℃時間：2019-10-25 10:08:21
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