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【单选题】
下列句子中加点的字解释有误的一项是 ( )A.
轮 廓 （物体的周围） 和谐 （配合得适当和匀称） 无可争 辩 （说明是非或争论真假）
B.
修 茎（长、高） 琢磨 （思索、思考） 取之不 尽 （完）
C.
玄秘 （玄妙、神秘） 根蒂 （事物的根基或基础） 坐立不 安 （ 安全 ）
D.
干 涸 （干枯无水） 芜蔓 （荒芜、荒凉） 久 经 风霜（经过）
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A.
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B.
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C.
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D.
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【简答题】醛的官能团是 ,酮的官能团是 。
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