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19.-Water covers most parts of the earth.
-Yes,about ______of the earth is covered with water.(  )
A.one fourthB.halfC.three quarters

分析 -水覆盖了地球的大部分.-是的,大约四分之三的地球被水所覆盖.

解答 答案:C a quarter四分之一;three quarters四分之三;是固定短语,所以不再用分数的一般表达法,排除A;根据常识可知水覆盖了地球表面的四分之三,故选C.

点评 本题考查了分数的表达法.分子用基数词,分母用序数词,当分子大于1时,分母后要加s.此题是特殊的分数表达,记住quarter,并注意学科间的联系.

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