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.

　　Nature provides other clues to changing weather. A decrease in air pressure causes deer and elk to come down from the mountains to look for shelter. Some animals feed more than usual. The higher humidity before a storm causes some insects to leave the trees and gather near the ground. Some flowers close so rain doesn’t get inside them. In winter, rhododendron plants curl up to protect themselves as the temperature drops.

　　Several of the sayings apply in particular areas of the world. Here are some of them.

　　■Early thunder, early spring.

　　■Rainbow in the morning 8ives you fair warning.

　　■When teeth and bones and bunions ache, expect the clouds to fill the lake.

【2016届四川省简阳市高考英语阅读理解选练（3）】相关文章：

★ 常熟市2014高考英阅读理解语一轮（暑假）训练题（2）及答案

★ 重庆市2014高考英语阅读理解一轮（精品）训练题（9）附答案

★ 重庆市2014高考英语阅读理解一轮（精品）训练题（8）附答案

★ 2017高考四川省广安市英语阅读理解一轮系列训练：22（含解析）

★ 浙江省湖州市2014高考英语阅读理解一轮（暑假）精炼（15）含答案

★ 浙江省湖州市2014高考英语阅读理解一轮（暑假）精炼（11）含答案

★ 贵州省贵阳市2014高考英语（新人教版）一轮阅读训练（25）附答案

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (25)

★ 2017届高考英语二轮复习大题冲关秘籍语法填空：体验真题（含解析）

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (40)