标题: 求助：关于Delta中的阅读中的几题！！！ [打印本页] 作者: saiko13 时间: 2010-4-5 15:23 标题: 求助：关于Delta中的阅读中的几题！！！ Delta 142 6.No one can be made better off without making someone else worse off. An economy is efficient if there is no way of reorganizing production and distribution to improve everyone's satisfaction. Economists call such a state allocative efficiency.AWhen people come to a market with goods they have produced, they trade their goods for those of others.B Every completed trade raises the satisfaction of both sides.C When all of the beneficial trades have been completed, no one can find another trade to improve his situation.D Under such conditions, the economy has attained allocative efficiency. 各位帮忙做做这道题，正确答案是D。
8. The irritation is caused by viruses or bacteria, exposure to tobacco smoke, or air pollution. Bronchitis is an inflammation of the bronchitis tubes in the lungs. A It often appears after a cold or an upper respiratory infection that does not heal completely. It also may accompany childhood infections such as measles, whooping cough , and typhoid fever. B The inflamed bronchial tubes secrete a sticky mucus called sputum. C The cough that comes with bronchitis is the body's attempt to eliminate it. D Other symptoms include discomfort or tightness in the chest, low fever, sore throat, and sometimes wheezing. Severe cases of bronchitis may lead to pneumonia.
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