2017届全国高考英语阅读理解训练（2）_高考复习指南

2017届全国高考英语阅读理解训练（2）

　　阅读理解---------B

　　Accurately forecasting the weather is a very hard thing to do. There are many parts of weather dynamics-the study of how water and air in motion cause weather patterns-to consider. Even the best forecast can be changed by a small weather disturbance halfway around the world. Today’s forecast use complex computer 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 of a low-pressure system. She might also observe the geese flying lower than usual, confirming the low-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 air pressure by adjusting how high they fly. In the fair, calm weather of a high-pressure system, the birds fly higher than in the stormy weather associated with a low-pressure system.