题目内容
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。
考点：考查分数。
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