文档介绍：专业文档珍贵文档重庆市南开中学 2014 高考英语阅读理解联合训练( 3 )及答案阅读理解 Accurately forecasting the weather isa very hard thing todo. There are many parts of weather dynamics-the study ofhow water and air in motion cause weather patterns-to consider. Even the best forecast can be changed bya small weather disturbance halfway around the world. Today ’s forecast puter models, weather instruments, and detailed analyses of daily observations to predict the weather. However, it hasn ’t always been that way. People, like your grandparents, use folklore and proverbs to help forecast the weather. They remembered what conditions caused changes and observed the factors associated with weather: atmospheric and cloud conditions, temperature, winds, and reactions of plants and animals. Many people believe that this way of forecasting weather is accurate more often than modem forecasting. Grandma ’s aching joints might indicate the arrival ofa low-pressure system. She might also observe the geese flying lower than usual, confirming the l ow-pressure system. Finally, she might feel dampness on her skin, a sign of high humidity ( 湿度). Based on these three observations, grandma might warn that a storm is brewing. Joints and nerves can indicate dropping air pressure, Dissolved gases in the blood form bubbles under low air pressure. This causes pain in joints and nerve endings. Geese and other birds respond to changes in a