题目

Handshakes are popular in China. However, wait for your Chinese partner to start the gesture. The Chinese will sometimes nod as the starting greeting. A visit to a school, a theater, or other workplaces is likely to be greeted with applause（鼓掌） as a sign of welcome. In turn , you should respond by applauding back. You should avoid making expansive gestures and using unusual facial expressions. The Chinese don’t often use their hands when speaking, will only become annoyed with a speaker who does this way, so try not talk with your hands. However, some hand gestures are still necessar在方格纸上有一个△ABC，它的顶点位置如图所示，则这个三角形是    三角形．