如图所示，某人站在湖边山上，设人眼在A点且高出湖面30m，他望见一艘飞艇停留在湖面上空某处并观察到飞艇底部标志P点的仰角为45°，其在湖中之像的俯角为60°，则飞艇离开湖面的高度为（已知，只考虑镜面反射，不考虑折射）（　　 ）

A．111.96m

B．81.96m

C．84.32m

D．114.32m

The project budget has been finalized．Additional work has been discovered that was not planned for in the budget or project scope．Where could the found to cover the newly discovered work item

A．Contingency reserv

B．Project profi

C．Management reserv

D．Abandoning fun