light can travel a distance of 299789 kilograms per hours反义疑

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light can travel a distance of 299789 kilograms per hours反义疑问句
1个回答 分类:英语 2014-10-04

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light can travel a distance of 299789 kilograms per hours,can't it
前肯后否.
加油!不明白再问!
 
 
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