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Because film is______to light it must be kept in darkness to avoid exposure under the sun...
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脊髓前角α运动神经元传出冲动增加使A、梭内肌收缩B、梭外肌.....
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He is a(n)______character who likes wearing a ber.....
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正文撰写的要求是()。A.中心明确,重点突出B.论据充分,逻辑.....
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高血压病死亡原因最常见的为A、心肌梗死B、脑血管意外C、肾衰.....
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The______scene of the waterfall is a perfect delig.....
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