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井口房和通風機房附近(???)m內,不得有煙火或者用火爐取暖。

2021-11-19 10:20 所屬題庫:井口 機房 煙火 火爐
題目信息:

  井口房和通風機房附近()m內,不得有煙火或者用火爐取暖。

  A.10

  B.20

  C.30

答案

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