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正常三尖瓣与二尖瓣血流多普勒频谱的特点,错误的是A、二者均.....
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In Western culture, an engagement begins with "yes" to a simple question: "Will you marry ..
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我国规定机械通风降温系统的空气途径比为()。A.1.2:1~1.3.....
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What is the main idea of the passage?A.Greeks a.....
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正确描述腮腺的解剖部位的是A、咀嚼肌前部的皮下,下颌后窝B.....
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—Excuse me, but can you tell me the way to the.....
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