Preemption is one of the handiest tools in the art of public relations .

公关艺术中，先发制人是最便捷的利器之一。

A person-machine interaction technology -- touch panel technology has become present handiest person-machine exchange input equipment . This paper mainly introduces the operating principle , technological progress and application of touch panels .

一种新的人机交互作用技术--触摸屏技术，已成为当前最简便的人机交流的输入设备。本文主要介绍触摸屏的工作原理和技术进展和应用。