来源:网络资源 作者:中考网整理 2019-05-08 20:22:22
What do you do if you're stranded(处于困境的)on a lonely island? Surely you need to find a way to get in touch with the outside world. Your best chance of doing this is to draw the attention of a passing plane.
Body signals(信号)
Pilots from different countries understand body signals if they have the correct training. When you wave your arms up and down in a straight line, it means
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