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It is said that the gravity on Mars is only about __________ of the gravity on earth.

A.three-eighthsB.third-eighthC.three-eighthD.third-eighths

 

A

【解析】

試題分析:句意:據說火星上的重力是地球上重力的八分之三。分數的表達為分子用基數詞,分母用序數詞,當分子大于一時,分母的序數詞用復數形式;故選A。

考點:考查分數的表達。

 

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