【多选题】下列对预算定额计量单位确定原则说法正确的有( )
A.
预算定额的计量单位一般是按工序或施工过程来定
B.
预算定额的计量单位主要是根据分项工程或结构构件的形体特征变化确定
C.
预算定额计量单位的确定首先要确切反映分项工程或结构构件的实物消耗量
D.
预算定额计量单位的确定其次要有利于减少项目、简化计算的目的
E.
预算定额计量单位的确定也要能较准确反映定额所包括的综合工作内容
【简答题】电子束加工是在_____条件下,利用电子枪中产生的电子经加速、聚焦,形成高能量大密度的细电子束以轰击工件被加工部位,使该部位的材料熔化和蒸发,从而进行加工,或利用电子束照射引起化学变化而进行加工
【多选题】下列对预算定额计量单位的确定,正确的是( )
【判断题】The main difference between contemporary dams and Dujiangyan system is that the former block the flow of water while Dujiangyan allows water to flow naturally.
【单选题】Water __________ such as dams and canals are threatening the fish population.
【判断题】Hydropower is electricity made by generators that are pushed by still water. It is usually made with dams that block a river to make a reservoir or collect water that is pumped there.
【判断题】The government has to open the dams to provide more water for the people.