考点规范练5(必修1　Module 5)

　　.阅读理解

　　The “greenhouse effect”is the warming that happens when certain gases in the Earth’s atmosphere trap heat.These gases let in light but keep heat from escaping,like the glass walls of a greenhouse.

　　First,sunlight shines onto the Earth’s surface,where it is absorbed and then radiates(放射)back into the atmosphere as heat.In the atmosphere,greenhouse gases trap some of this heat,and the rest escapes into space.The more greenhouse gases are in the atmosphere,the more heat gets trapped.

　　Scientists have known about the greenhouse effect since 1824,when Joseph Fourier calculated that the Earth would be much colder if it had no atmosphere.This greenhouse effect is what keeps the Earth’s climate livable.Without it,the Earth’s surface would be an average of about 60 degrees Fahrenheit(华氏温度)cooler.In 1895,the Swedish chemist Svante Arrhenius discovered that humans could increase the greenhouse effect by making carbon dioxide,a greenhouse gas. He kicked off 100 years of climate research that has given us a good understanding of global warming.

　　Levels of greenhouse gases(GHGs) have gone up and down over the Earth’s history,but they have been fairly constant for the past few thousand years.Global average temperatures have stayed fairly constant over that time as well,until recently.Through the burning of fossil fuels and other GHG emissions(排放物),humans are increasing the greenhouse effect and warming the Earth.

【2016届高考英语一轮复习(外研版)考点规范训练：必修1 Module 5　A Lesson in a Lab】相关文章：

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修4 unit5《Theme parks》

★ 2017届高考英语（江苏专用）二轮复习高考单词5大记忆法课件：4.联想记忆法

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (6)

★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ题型重组训练：第20组（含解析）

★ 2014届高考英语一轮复习课时作业(十九)必修4Module 1《Life in the Future》（外研版）

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (97)

★ 2017届高考英语二轮复习大题冲关秘籍阅读理解七选五：创新押题（含解析）

★ 2016年高考英语二轮复习指导：快速阅读四大法则

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (39)

★ 【浙江专用】2014届高考英语一轮复习课时作业(二)必修1Unit 2《English around the world》