题目内容

应用SH/T0713汽油中苯及甲苯含量气相色谱法中,反吹阀完成反吹动作后,基线出现波动的原因是()。

A. 两根柱流量不一致
B. 色谱柱堵
C. 反吹时间不对
D. 反吹阀漏

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B. Crosses metropolitan, regional, or national boundaries
C. Encompasses an entire city or metropolitan area and connects multiple local-area networks (LANs)
D. Connects client devices wireless protocol

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A. 会话层
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C. 网络层
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