问题
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Scientists now believe that artificial－hip implants, previously thought to be safe, may ac
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orlly disintegrating tablets
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共用题干第三篇First Self-contained Heart Implanted
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共用题干第三篇First Self-contained Heart Implanted
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共用题干第三篇First Self-contained Heart Implanted
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共用题干第三篇First Self-contained Heart Implanted
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