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标题: 请教一个问题 [打印本页]

作者: hollyyao    时间: 2012-12-21 15:56
标题: 请教一个问题
OG13, Q35
By 1940 ,the pilot JAC COC held 17 official national and international speed records, and she earned them at a time when aviation was still so new for many of the planes she flew to be of dangerously experimental design.
为什么加粗部分OG说他没解释清楚。 还有正确答案是 earned at a time...    , 这里是不是省略了which are??




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