题目内容
I would consider bungee(蹦极) jumping to be a good example of such an activity. You jump from a high place about 200 meters above the ground with an rope tied to your ankles. You fall at up to 150 kilometers an hour until the rope stops you from hitting the ground. It is said that 2 million people around the world have now tried bungee jumping. Other activities which most people would say are as dangerous as bungee jumping include jumping from tall buildings and diving into the sea from the top of high rocks.
Why do people take part in such activities as these？ Some psychologists(心理学家) suggest that it is because life in modem societies has become safe and boring. Not very long ago, people's lives were constantly under danger. They had to go out and hunt for food, and life was a continuous battle for survival(生存).
Nowadays, according to many people, life offers little excitement. They live and work in relatively safe conditions; they buy food in shops; and there are doctors and hospitals to look after them if they become ill. The answer for some of these people is to look for danger in activities such as bungee jumping.
What is special about bungee jumping？
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More than 4,000 years ago, a primitive (上古的)artist carved a picture on the side of a rock in northern Norway. The carving described a man on a pair of skis, Today, more than 'a million Americans have something in common with that Stone Age character -- they have joined in a fast-growing sport called" ski touring".
Ski touring is healthy, cheap, unpretentious (自然的)fun -- and an excellent winter family activity. It is a more demanding sport and requires first-class physical condition and a good deal of energy. To a ski tourer, the joy of this sport lies in its simplicity. It can be enjoyed wherever there is snow on an open field or road.
As ski touring grows more popular, equipment for the sport is expanding, too. There are now chains of commercial ski touring centers renting and selling equipment and providing instruction. While some members of the family may be chicken about schussing (作直线下滑) down mountainsides, today everybody can go on a touring trip.
Ski touring probably began in ______.
古罗马教育家西塞罗论述教育的主要著作是（）
成人早餐摄取的热能应占全天总热能的
【B3】
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