题目内容

什么是烟、风道的摩擦阻力？什么是局部阻力？什么是管束阻力？

查看答案

搜索结果不匹配？点我反馈

更多问题

Legends have it that the Garden of Eden situated on the Mesopotamian plain。（)

什么平衡通风中需要又可能保持炉膛负压20-50pa？除平衡通风外，还有什么通风系统能维持负压？

Lyric is a poetic form. so called because it was originally sung by individuals or a chorus accompanied by a musical instrument called the lyre。（)

Out of great respect for traditions, the Romans were reluctant to make reforms。（)