free-answer question
... follow-up study追迹研究 ꧧ free-answer question自由回答法 * frequency distribution频率分布 布 ...
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根据照信息自由法，联邦机构被正式要求在收到请求20个工作日内（在特定情况下可以延长10个工作日），对按这项法律作出的请求作出回答。
Under the statute, federal agencies are normally required to respond to a FOIA request within 20 business days of its receipt, but may extend this by 10 business days under certain circumstances.
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