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搜题
【单选题】
在 TN-S 接地系统中,零线与地线是
A.
?分开两根
B.
?共用一根
C.
?有时分开有时共用?有时分开有时共用?
D.
?都可以
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病毒
B.
细菌
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D.
衣原体
【单选题】小儿上呼吸道感染最常见的病原体是
A.
细菌
B.
病毒
C.
支原体
D.
衣原体
E.
真菌
【单选题】小儿上呼吸道感染最常见的病原体
A.
病毒
B.
细菌
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E.
肺炎球菌
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A.
呼吸道合胞病毒
B.
肺炎链球菌
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B.
肺炎链球菌
C.
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D.
D 轮状病毒
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A.
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B.
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D.
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A.
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B.
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