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

A.three-eighths B.third-eighth 
C.three-eighth D.third-eighth 

A

解析試題分析:英語(yǔ)分?jǐn)?shù)的表達(dá)是分子用基數(shù)詞,分母用序數(shù)詞,分子超過(guò)一,分母用復(fù)數(shù)。先排除B,D,故選A。句意為:據(jù)說(shuō)火星的重力只有地球重力的八分之三。
考點(diǎn):考查分?jǐn)?shù)。

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