题目

       Communicating effectively means more than knowing what to say and when to say it. Communication involves the subtle signals your body language sends to those who are watching. Here are some common body actions and the impressions they create: ● Fiddling (好动) — Playing with your watch or a pen looks like you’re bored or impatient. ● Clock watching — It looks like you’re to move on to something else. ● Tapping  — Tapping your feet or fingers suggests you are impatient or nervous. ● Staring — An unblinking (不眨眼的) stare conveys threatening or violen与点P（-2，4）关于坐标原点对称的点是    ．