Have you heard of it? Firefighters rushed into a burning house, three of them unfortunately _______ in and ________ their lives.

A．catching; lost

B．caught; lost

C．caught; losing

D．catching; losing

下列不属于人力资本投资活动的是( )。

A．各级正规教育
B．工作流动
C．加强学龄前儿童的培养
D．高强度与高压力的工作