固井的主要工艺过程是()。
A.射孔
B.试油
C.下套管
D.酸化压裂
E.注水泥
参考答案:C, E
(75) is the budgeted amount for the work actually completed on the schedule activity or WBS component during a given time period.
A.Planned value
B.Actual cost
C.Earned value
D.Cost variance
以曲轴加工为例,说明为什么机械加工工艺性的评价应依据生产厂的生产条件,没有一个绝对的标准。