无效合同自()时无效。
A、成立
B、履行
C、订立
D、确认无效
参考答案:C
当艾滋病病毒感染者发展成为艾滋病人时,会出现()
A.长期低热
B.体重下降
C.盗汗
D.慢性腹泻
E.全身淋巴结肿大
A recommended corrective action is an output of which cost management process area ().
A.Resource planning
B.Cost estimating
C.Cost budgeting
D.Cost control