J. Selden once said: “Ignorance of the law excuses no man; not that all men know the law, but because it is an excuse every man will , and no man can tell how to refute him.”
【简答题】According to the passage, we give school children difficult problems to solve in order to_________ [ A] encourage them to learn [ B] teach them to fear the pain of solving the problem [ C] help them l...