此试题出现在
某一高位槽供水系统如附图所示,管子规格为φ45×2.5mm。当阀门全关时,压力表的读数为78kPa。当阀门全开时,压力表的读数为75kPa,且此时水槽液面至压力表处的能量损失可以表示为ΣW f=u 2J/kg(u为水在管内的流速)。试求: (1)高位槽的液面高度; (2)阀门全开时水在管内的流量(m 3/h)。
中毒性菌痢的主要病理变化是
诊断骨折的主要依据是
综合广告代理公司的组织结构一般都要设立哪些部门?
中国非政府组织在现阶段主要存在哪几个问题?
社会养老保险的目的是对劳动者退出劳动领域后的基本生活予以保障,这一原则更多地强调社会公平性。一般而言,低收入人群基本养老金替代率(指养老金相当于在职时工资收入的比例)()
()摒弃了常规包装机械中的繁琐和不合理部分,而将机械、微机、微电子、传感器等多种学科的先进技术融为一体,给包装机械在设计、制造和控制方面都带来了深刻的变化,从根本上改变了包装机械的现状。
演示腋窝淋巴结的检查。
三极管共集电极放大电路只有()放大作用。
关于现金流量图绘制规则的说法,正确的有()。
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