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适合高中生的比较好的网课，推荐你看简单学习网的，一家拥有15年教学经历的网校，学校的老师都是经过精挑细选，层层筛选，很多学生慕名而来，可以去网校领取免费试听课。
北京简单科技有限公司创立于 2007 年,基于与北京大学共同开发的 “CAT 智能引领互动国家专利技术 ” 自创了互动、封闭的中学名师网校 —— 简单学习网。
简单学习网是北京简单科技有限公司旗下网站，专注于网络辅导业务。各版本数百门优质名师课程，全部课程以短视频形式呈现，涵盖高中的所有学科知识。
简单学习网帮助高中生们查漏补缺，成绩不同，学习方法不同，针对实际情况，选择适合自己的学习方案。
为什么推荐简单学习网？
1、老师好
坚持每科只请优秀教师录课
2、资源全
科目全、层次全、版本全（除港澳台外）
3、简单学习五步法
先练后听反思再练追错，让学习更科学更高效
4、随时听反复听
随时随地，个性化，自主学习
【学员评价】
非常建议听孙明杰老师的解析几何和导数，真的超好，我认为没有老师在这块能比得上孙明杰老师。
孙明杰的课非常有连贯系统，体系性。在他的体系引导和真题讲解中随时都渗透着思想。他会帮助你会建立一个完整有逻辑的高中数学知识体系。
李跃旭的课容量比较大，要时间消化，但满满都是知识点，讲课风趣幽默，并且很有自信涉猎广泛，讲题有条理，让我很有学化学的兴趣。
徐老师不可否认在很认真的备课，实力也很强，很崇拜徐老师。
高考英语阅读理解试题之生态环保类
The need to feed a growing population is putting much pressure on the world‘s supply of water. With 97% of the world’s water too salty to be drunk or used in agriculture， the worldwide supply of water needs careful management， especially in agriculture. Although the idea of a water shortage(短缺)seems strange to someone fortunate enough to live in a high rainfall country， many of the world‘s agricultural industries experience constant water shortages.
Although dams can be built to store water for agricultural use in dry areas and dry seasons， the costs of water redistribution(重新分配)are very high. Not only is there the cost of the engineering itself， but there is also an environmental cost to be considered. Where valleys(山谷)are flooded to create dams， houses are lost and wildlife homes destroyed. Besides， water may flow easily through pipes to fields， but it cannot be transported from one side of the world to the other. Each country must therefore rely on the management of its own water to supply its farming requirements.
This is particularly troubling for countries with agricultural industries in areas dependent on irrigation (灌溉)。 In Texas， farmers’ overuse of irrigation water has resulted in a 25% reduction of the water stores. In the Central Valley area of southwestern USA， a huge water engineering project provided water for farming in dry valleys， but much of the water use has been poorly managed.
Saudi Arabia‘s attempts to grow wheat in desert areas have seen the pumping of huge quantities of irrigation water from underground reserves. Because there is no rainfall in these areas， such reserves can only decrease， and it is believed that fifty years of pumping will see them run dry.
1. From the first two paragraphs we learn that________.
A. much of the world’s water is available for use
B. people in high rainfall countries feel lucky
C. the costs of water redistribution should be considered
D. water can be easily carried through pipes across the world
2. Which of the following is TRUE?
A. The water stores in Texas have been reduced by 75%.
B. Most industries in the world suffer from water shortages.
C. The underground water in Saudi Arabia might run out in 50 years.
D. Good management of water use resulted from the project in the Central Valley.
3. What is most likely to be discussed in the paragraph that follows?
A. Steps to improving water use management.
B. Ways to reduce the costs of building dams.
C. Measures to deal with worldwide water shortages.
D. Approaches to handling the pressure on water supply.
4. The text is mainly about________.
A. water supply and increasing population
B. water use management and agriculture
C. water redistribution and wildlife protection D. water shortages and environmental protection
答案与解析
世界的可用淡水资源有限，但农业在利用水资源过程中存在不尽如人意之处，本文指出了其中的一些问题。
1.C 细节理解题，由文中第一段第二句“With 97% of the world‘s water too salty to be drunk or used in agriculture.。.”可知A选项错误;由第一段第三句“。..strange to someone fortunate enough to live in a high rainfall country.。.”可知B选项不合文意;第二段前两句指出水资源的重新分配的费用极高，一方面是水利过程本身的造价，另一方面也会对生态造成极大的破坏，所以选项C正确，根据第二段第四句“。..it cannot be transported from one side of the world to the other.”可知D项不正确。
2.C 细节理解题。根据文章第三段第二句“。..has resulted in a 25% reduction of the water stores.”可判断A选项不正确;由第一段最后一句可判断B选项错误;由文章最后一句“。..fifty years of pumping will see them run dry.”可知C项正确。根据文章第三段最后一句可知D项不正确。
3.A 判断推理题。文章前面一部分主要是讲述农业在利用水资源过程中存在的问题，接下来应该是介绍加强水资源管理的方法和措施，所以A选项正确。
4.B 主旨大意题。由第一段第二句可知。
