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标题：
Identify the errors in the following sentence:She was twice as old as my twenty-year-old sister unless she looked young. ( )
错误类型：
错别字(除的、地、得)
成语运用不当
专业术语写法不规则
产品与图片不符
事实年代以及内容错误
技术参数错误
其他
错误内容：
修正建议：
