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It is said that the gravity on Mars is only about __________ of the gravity on earth.
A.three-eighthsB.third-eighth
C.three-eighthD.third-eighth
A

试题分析:英语分数的表达是分子用基数词,分母用序数词,分子超过一,分母用复数。先排除B,D,故选A。句意为:据说火星的重力只有地球重力的八分之三。
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