【判断题】流体流动类型分为层流或滞流和湍流或紊流。 ( )
【单选题】关于供水工程系统的说法,下列哪一项不属于按照供水方式的分类?
【单选题】The doctor I should have a good rest is going abroad for further education.
【单选题】下面关于 BT 型楼梯描述正确的是( )
【单选题】The doctor I should have a good rest is going abroad for further education.
【简答题】按照流体流动产生的原因,流动可分为______和______两类。