prp-d 中文意思是什麼
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D : many firms in the metalworking industry have moderized production equipment in the last five years, and most of these introduced prp contracts the same time
問題：這個選項並沒有講現化化使生產率提高，如果有講，那當然是他因，但d根本沒講，只是講現代化和prp的引進時間相同。
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