1-5月标准体系

方向标志灯的标志面与疏散方向垂直时，灯具的设置间距不应大于（）m

发布于 2021-02-22 05:55:48

【单选题】
A 10
B 15
C 20
D 25

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信仰。 2023-02-22

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这家伙很懒，什么也没写！

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