三维英语阅读

章节摘录

　　Soil is made up of a number of layers （层）, each having its own distinctive color andtexture. The upper layer is known as the litter. It acts like a blanket, limiting temperaturechanges and reducing water loss. The topsoil layer is made up of small particles of rock mixedwith rotten plant and animal matter called humus （腐殖质）, which is black and gives the topsoilits dark color. This layer is usually rich in nutrients, oxygen, and water. Below the topsoil is thesubsoil, a layer that contains more stones mixed with only small amounts of organic matter. Thislayer is lighter in color because of the lack of humus. Beneath the soil lies a layer of bedrock.　　Soil forms from the bottom up. Over time bedrock is attacked by rain, wind, frost, andsnow. It is gradually broken down into smaller particles in a process called weathering. Plantsbegin to grow, and rotten materia　　s enrich the topsoil. Most of the soil in Eastern Canada, forexample, was formed from weathered rock that was exposed when the ice disappeared 12,000years ago.Water Beneath the Soil.　　Surface water collects and flows above the ground in lakes, ponds, and rivers. Once in thesoil or rock, it is called groundwater. Gravity pulls groundwater through the soil in a processcalled percolation （渗透）. Eventually the water reaches a layer called the water table. Under thisis bedrock through which water cannot percolate.　　As water percolates downward, it dissolves organic matter and mineras from the soiland carries them to deeper layers. This causes a serious problem because plants require thesenutrients for growth. 　　……

书籍目录

UNIT 1 HealthcareUNIT 2 NatureUNIT 3 AstronomyUNIT 4 Reading & WritingUNIT 5 EnvironmentUNIT 6 WomenUNIT 7 Career DevelopmentUNIT 8 Childhood EducationUNIT 9 Social SkillsUNIT 10 HistoryAnswer keys

作者简介

《红魔英语•三维英语阅读(高1年级下)(黑白版)》所谓三维，即阅读技能，词汇运用和书面表达。我们以阅读技能为基础，通过合理的设题，强调阅读技能的综合运用，并按照英美等英语国家公认的阅读技能点进行整理，总结出22项必备的阅读技能。本丛书编者根据我国学生的学习特点和现有的课程标准，将这些技能在各种题型中重复出现，力求使读者灵活掌握、灵活运用，真正地学懂英语，学好英语。此外，每个单元的习题和讲解，兼顾了功能性的阅读技能点和历年中考、高考真题中的精华和疑难题目，学生既可以通过系统地学习本丛书获得实用阅读技能，也可以通过其中的习题进行有针对性的应考复习。

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