甲、乙两台机械,其功率之比是2:1,乙做功是甲做功的5倍,则甲、乙做功所用时间之比是________。
1:10
防潮包装工艺不包括()等工序。
A、除氧
B、除二氧化碳
C、排除包装容器内空气中的水分
D、除空气
E、限制透入容器内的水蒸气量
Project()Management includes the processes required to ensure that the project includes all the work required, and only the work required, to complete the project successfully.
A.Integration
B.Scope
C.Configuration
D.Requirement