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14. The proof that the U.S. Food and Drug Administration requires for the safety and validity of a new medicine should be empirical.
(A) based on experiment
(B)durable
(C) authoritative
(D) well presented


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 【站僕】摩檸Morning:有沒有達人來解釋一下?
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14. The proof that the U.S. Food and Dru..-阿摩線上測驗