m,n互为相反数,则3-m-n=( )。
3
A detailed project schedule can be created only after creating the ().
A.project budget
B.work breakdown structure
C.project management plan
D.detailed risk assessment
下列选项中,不能反映企业经营成果的要素是( )。
A.收入
B.费用
C.利润
D.资产