角动量守恒

Almost in breadth and depth of a documentary, this movie depicts an auto race during the 70s on the world's hardest endurance course: Le Mans in France. The race goes over 24 hours on 14.5 kilometers of cordoned country road. Every few hours the two drivers per car alternate - but it's still a challenge for concentration and material. In the focus is the duel between the German...。Cat experts dive into the feline’s mind.。