小官极速搜题练习工具
采用负压通风(抽出式)的矿井,其瓦斯涌出量与其通风压力____。A.成正比B.成反比C.无关
【正确答案】A
Copyright © 2026 极搜搜 | Powered by Specia WordPress Theme 沪ICP备2021005711号-2