因合法建造、拆除房屋等事实行为设立或消灭物权的，物权自（）时发生效力。
A.交付
B.法律行为生效
C.事实行为成就
D.当事人申请
参考答案：C
---Where has Mary been? I haven't seen her all day?
---Oh,in order not to be disturbed, she spent the whole day __in the study, ___ her report.
A．locking;preparing
B．locked; prepared
C．locked; preparing
D．locking; prepared
心为
A．生之本B．气之本C．罢极之本D．封藏之本E．仓廪之本
