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In some countries, treatments for A flu were neither nor effective, and many pat

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In some countries, treatments for A flu were neither nor effective, and many pat

In some countries, treatments for A(H1N1) flu were neither ________ nor effective, and many patients died because of infection．

         A．critical        B．scientific       C．necessary  D．special

试题答案

B

标签：werefluneithereffectivenor

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