《物业管理条例》正式颁布后，物业管理政策法规主要体现的特点是( )。
A．先进性 B．指导性C．示范性 D．配套性
参考答案：D
--- Now the situation has been kept under ______ control.
--- Yes. ______ role John played in it was very important.
A．the; A
B．/; The
C．the; The
D．/; A
延长插花花期的方法有烫封法、添加剂法、花泥插花法、（）。
