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农业政策效率评估是通过对农业政策投入与产出之间比例关系的分析，确定政策的合理程度。
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Who delivers this speech?（查阅课外资料）
Among them, who also delivers speech in Pittsburgh?（查阅课外资料）
Directions: There are two or three meanings for each semi-technical term underlined in th following sentences. Choose the correct one according to the context.1. Researchers can combine them easily and inexpensively, into thin films that have a highly crystalline structure similar to that achieved in silicon wafers after costly, high-temperature processing.
六朝时期代表陶瓷器型为？
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