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??