【简答题】Lie detectors are widely used in the United States to find out whether a person is telling the truth or not. Paleographers, the people who operate them, claim that they can establish guilt by detectin...
【简答题】Uncle Li and Uncle Wang are good friends. They live next to each other and their farms are both at the foot of the mountain. So they can help each other. But neither of them likes to use his head. The...