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试概述微观经济学的理论体系，并说明微观经济学研究的中心问题。
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As the pace of life continues to increase, we are fast losing the art of relaxation. Once you are in the (67) of rushing through life, being on the go from morning till night, it is hard to (68) down. But relaxation is essential for a (69) mind and body. Stress is natural part of everyday life and there is no way to (70) it. In fact, it is not the bad thing it is often (71) to be. A certain amount of stress is vital to provide (72) and give purpose to life. It is only (73) the stress gets out of control that it can lead to (74) performance and ill health. The amount of stress arsons can withstand depends very much (75) the individual. Some people are not afraid of stress, and (76) characters are obviously prime material for managerial responsibilities. Others lose (77) at the first signs of unusual difficulties. When (78) to stress, in whatever form, we react both chemically and (79) . In fact we make choice between "flight and fight" and in more primitive days the choices made the difference (80) life and death. The crises we meet today are (81) to be so extreme, but however little the stress, it (82) the same response. It is when such a reaction lasts long, through continued (83) to stress, that health becomes (84) . Such serious conditions as high blood pressure and heart diseases have (85) links with stress. Since we cannot (86) stress from our lives (it would be unwise to do so even if we could), we need to find ways to deal with it.
阅读下面的现代文，完成第11～15题。 听泉 演奏《二泉映月》，有一种心灵沐浴冲凉的感觉，琴弓的马尾吃住了弦，像是把山里的玉石锯开了一个小缝儿，泉水呢，顺着左手指头尖儿款款地流出来，跌扑回还，绕在身边。心里所有的浮躁、郁闷、烦琐，都被淙淙流泉冲走了。身上清爽得很，干净得很。舌根也甜润润湿漉漉。说来真得感谢盲人音乐家阿炳(华彦钧)，他用一把二胡，教会了我们听泉，让我们知道，感觉山中清泉，应该打通生命所有孔窍，只凭眼睛直观是不够的。是啊，古人说刑天舞干戚，以乳为目，以脐为口，就是说人的浑身上下都生着精明的感官，人本来就是精灵剔透的灵长目，我们和炳哥的差别就在于不懂得让心灵长出眼睛看宇宙，让耳朵生出触须抚摸自然，从这个角度说，也许我们才是真正的“盲人”。还有，我们没有化清流为音乐的神力，在盲人音乐家阿炳这里，泉水是灵感的婴儿。他一下子就捕捉住了稍纵即逝的灵感，再加进自己的天分、才情与生命感悟，人间就流淌出了不朽的经典，音乐的清泉《二泉映月》。 “二泉”从前只是伴穷道士沿街卖艺的一支曲子，如果不是遇到杨荫浏先生，那音乐的“泉水”不知会在哪儿幽咽断流了。我在音乐学院学琴的时候，老先生杨荫浏的学养和人品极为师生尊崇，杨荫浏和阿炳之间的理解与默契，是人间知音的绝唱，俞伯牙与钟子期也不能相比。换句话说，琴师俞伯牙倘若遇到杨荫浏，就大可不必因世无知音摔碎瑶琴了。杨荫浏是在建国初期为抢救濒临灭绝的文化遗产寻访阿炳的。背着笨重的录音机，他和阿炳谈心，谈艺，谈琴。用那时候流行的“履带”般的录音机带，录下了阿炳的曲子。这首曲子无题，阿炳让杨先生取个题目，杨先生思忖了片刻说，就叫做《二泉映月》吧。 可以想象这时候阿炳是多么感动和惊奇，他那深陷的眼窝红了，几乎要流出“泉水”了。面前这位先生不仅听懂了他，把他的琴声录下来，让他的音乐永远活着，而且，一语点睛，触动了他的心泉之门。是呵是呵，这娓娓动听的音乐，不是映月的天下第二泉又是什么泉水一冲出深山罅隙，月光扑了过来。一轮梨花月变成了液体。揉碎了的月光，叮叮咚咚唱着歌，奔跑跳跃在惠山绿竹林青草地。忽然从高高的石崖向下“蹦极”，珠玉四溅；忽然在花丛潜伏蛇行，若断还连，幽幽咽咽的；忽然又在光滑的鹅卵石溪床上跳着轻盈的舞步，带着小鱼。携着蝌蚪，跑向山外的世界……音乐在胡琴的三个把位回还，如曲水流觞。装饰音和滑音机智乖巧，似鱼嬉水草。抖弓细碎流畅，清流里有诉不尽的柔情。《二泉映月》是回旋曲式，让人把醉人醒泉回味品咂个够。更要紧的是，杨先生听着盲人音乐家心泉的律动，深深感觉到了阿炳对生命和自然的热爱，也听到了涌动的泉水里，有一点儿淡淡的哀伤。 阿炳和杨荫浏都已经离我们远去了，可映月的二泉还奔涌在我们的生命和生活中，记得，这首美妙绝伦的乐曲使著名指挥家小泽征尔由衷倾倒，他说过，二泉映月应当跪下来听。是的，此曲只应天上有，人间哪得几回闻也许，唯有双膝跪倒，才可以聊表心中的虔敬和感激。我们感激创造美的阿炳和发现美的杨荫浏。阿炳开掘出了他心中独一无二的音乐泉，杨萌浏牵着“泉水”的手，出了山。 “杨荫浏和阿炳之间的理解与默契，是人间知音的绝唱”体现在哪里
As the pace of life continues to increase, we are fast losing the art of relaxation. Once you are in the (67) of rushing through life, being on the go from morning till night, it is hard to (68) down. But relaxation is essential for a (69) mind and body. Stress is natural part of everyday life and there is no way to (70) it. In fact, it is not the bad thing it is often (71) to be. A certain amount of stress is vital to provide (72) and give purpose to life. It is only (73) the stress gets out of control that it can lead to (74) performance and ill health. The amount of stress arsons can withstand depends very much (75) the individual. Some people are not afraid of stress, and (76) characters are obviously prime material for managerial responsibilities. Others lose (77) at the first signs of unusual difficulties. When (78) to stress, in whatever form, we react both chemically and (79) . In fact we make choice between "flight and fight" and in more primitive days the choices made the difference (80) life and death. The crises we meet today are (81) to be so extreme, but however little the stress, it (82) the same response. It is when such a reaction lasts long, through continued (83) to stress, that health becomes (84) . Such serious conditions as high blood pressure and heart diseases have (85) links with stress. Since we cannot (86) stress from our lives (it would be unwise to do so even if we could), we need to find ways to deal with it.
As the pace of life continues to increase, we are fast losing the art of relaxation. Once you are in the (67) of rushing through life, being on the go from morning till night, it is hard to (68) down. But relaxation is essential for a (69) mind and body. Stress is natural part of everyday life and there is no way to (70) it. In fact, it is not the bad thing it is often (71) to be. A certain amount of stress is vital to provide (72) and give purpose to life. It is only (73) the stress gets out of control that it can lead to (74) performance and ill health. The amount of stress arsons can withstand depends very much (75) the individual. Some people are not afraid of stress, and (76) characters are obviously prime material for managerial responsibilities. Others lose (77) at the first signs of unusual difficulties. When (78) to stress, in whatever form, we react both chemically and (79) . In fact we make choice between "flight and fight" and in more primitive days the choices made the difference (80) life and death. The crises we meet today are (81) to be so extreme, but however little the stress, it (82) the same response. It is when such a reaction lasts long, through continued (83) to stress, that health becomes (84) . Such serious conditions as high blood pressure and heart diseases have (85) links with stress. Since we cannot (86) stress from our lives (it would be unwise to do so even if we could), we need to find ways to deal with it.
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