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【单选题】
新生儿呼吸的特点是()A.
呼吸深长
B.
呼吸频率慢
C.
呼吸浅而快
D.
极不规则
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A.
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A.
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B.
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C.
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D.
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A.
由关节软骨、关节囊、关节腔构成
B.
关节腔内为负压
C.
关节囊分泌滑液
D.
滑膜关节比直接连接的灵活性好
E.
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A.
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B.
产品说明书
C.
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D.
由于产品和服务的性质所导致的潜在失效后果