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When we think of stress, we usually think of its negative effects. Studies, though, show that moderate levels of stress are actually helpful. In fact, the way we perform is usually affected by the amount of stress we feel. Stress causes the brain to release adrenaline(肾上腺素) which in turn increases our energy and excitement. The chemical gives us clearer minds and helps us to do more. This is why some people say they work better under a deadline. Adrenaline that is not released for long periods of time can cause us to increase and strengthen our abilities instead of weakening them. We sometimes turn out our very best work when we push ourselves to the limit. Stress can also make us more confident. Handling small amounts of stress now prepares us for handling serious situations in the future. Who knows? Today’s stress may even prepare for the next polar bear that comes along! 45. In the first paragraph, the case of Lydia Angyiou is mentioned to______. A. introduce the topic to be followed B. remind us of the unexpected danger of life C. praise Lydia Angyiou for her bravery D. show the importance of super-human strength 46. What does the policeman probably mean by saying “your back is up against the wall”? A. You are helped. B. You are inspired. C. You are confident. D. You are cornered. 47. What would be the best title for the passage? A. Brave Mother B. The Cause of Stress C. The Benefit of Stress D. Super-human Strength C Are you nervous about climbing because you think it’s too dangerous? Do you feel you’re not fit enough to climb? Do you know how to start climbing? Let’s consider the idea that climbing is dangerous. Being afraid is natural, but if you use suitable ropes and other climbing equipments you will feel completely safe. Climbers are usually very careful because they know what they are doing is dangerous. Accidents happen, but when they do, they tend to attract a lot of publicity. As a result, people think there are many more accidents than there are in reality. (责任编辑：admin) |