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diamonds are very impressive as they are mined钻石刚开采时并不光彩照人.diamonds are very impressive as they are mined钻石刚开采时并不光彩照人.英语有语法错误吗?as可以改成at吗?

题目详情
diamonds are very impressive as they are mined钻石刚开采时并不光彩照人.
diamonds are very impressive as they are mined钻石刚开采时并不光彩照人.
英语有语法错误吗?as可以改成at吗?
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答案和解析
没有语法错误,as不可以改成at,这里的as引导后面的时间状语从句,意思是“在什么时候”