Public relations practice is the deliberate , planned and sustained effort to establish and maintain mutual understanding between an organization and its public.

A．complete

B．related

C．intentional

D．active

POP广告的绘制工具包括：笔具、（）、粘贴工具、喷枪工具

A、清洁工具

B、裁剪工具

C、修改工具

D、曲线工具