B

　　Modern life is highly dependent on energy to heat buildings,cook food,and run automobiles and machinery.In many volcanic regions geothermal(地热的)resources are exploited either directly for heat,or indirectly for the production of electricity.Geothermal energy may be renewable,if it is used at a lower rate than the natural heating.It is also clean compared with the burning of fossil fuels.

　　Volcanic ash and lava from eruptions often cover large areas of ground and are detrimental to life,but over time these same materials gather to form soils.The resulting volcanic soils have unique physical and chemical features.Some mountainous volcanic regions are famous for their production of coffee or wine,owing to volcanic soils.

　　Volcanic rocks are the most plentiful rock in many areas and are often employed as a building material for structures,road beds and walls.The altered volcanic clay,bentonite(斑脱土),is commonly used in diverse products from drilling mud to cosmetics.

　　Hot springs and fumaroles are often found in close association with volcanoes.This combination has led to the development of many spas and resorts at volcanoes.The attractive mountainous volcanic areas are also attractive sites for hiking,camping,and climbing as well viewing the various surface expressions of volcanic activities.

　　Ironically,much of what we know of some ancient civilizations was instantly protected by the powerful force of volcanic eruptions.Examples include the well-known Roman cities of Pompeii and Herculaneum,and the Bronze Age Akrotiri in the Aegean.

【2017届高考英语一轮复习知识梳理练习：选修6 Unit 18 Beauty（北师大版）】相关文章：

★ 【浙江专用】2014届高考英语一轮复习课时作业(二十八)选修6Unit 3《A healthy life》

★ 2014届高考英语一轮复习课时作业(三十七)选修7Module 1《Basketball》（外研版）

★ 【三维设计】2017版（江苏专用）二轮复习练习：选修8 Unit 4《Films and film events》课时跟踪检测A卷（含解析）

★ 2017届高考英语二轮复习大题冲关秘籍短文改错：创新押题（含解析）

★ （安徽专用）2014届高考英语一轮复习方案 作业手册（4）模块2 《Unit 4 Cyberspac》（含解析） 北师大版必修1

★ （安徽专用）2014届高考英语一轮复习方案 作业手册（2）模块1 《Unit 2 Heroes》（含解析） 北师大版必修1

★ 2017届江苏省淮安市新马中学高考牛津译林版英语一轮复习活动单：模块6 Unit 2《What is happiness to you》

★ 【三维设计】2017届高考英语（江苏专用）二轮复习课件：必修4 Unit 1《Advertising》

★ 2014年牛津译林版高中英语总复习（第1轮）同步练习 M3《Unit 3 Back to the past》

★ 2017届高考英语二轮复习课时训练：6（含解析）