题型:阅读理解 题类:模拟题 难易度:普通
黑龙江省哈尔滨市第三中学2018届高三英语第二次模拟考试试卷
The discussion on renewable energy has been going on for at least a decade and people have relied on fossil fuels almost entirely for more than a century. However, the situation when fossil fuels were the most efficient and the cheapest source of energy has been left far in the past. Many countries such as Germany and Sweden have already made significant efforts to fix this situation, employing numerous power plants working on the renewable resources of energy. The most effective among these resources is geothermal(地热的)energy.
Geothermal energy does not depend on the world's economic and political situation as strongly as fossil fuels do. Besides, extracting(提炼)fossil fuels adds to the price of energy produced from them. Therefore, geothermal energy is much cheaper than traditional ones, saving up to 80% of the costs over fossil fuels.
Being a renewable resource, geothermal energy produces less waste and pollution than traditional energy sources. In geothermal systems, carbon dioxide makes up about 10% of air produced. Overall, in order to produce the electricity that can be used for one hour, the geothermal systems produce 0.1 pound of carbon dioxide and other harmful gases. For a comparison, a power plant producing from gas produces up to 2 pounds of carbon dioxide into the atmosphere, and those power plants that work on coal(煤)produce an astonishing 3.6 pounds of greenhouse gases.
Low costs is another reason why using geothermal power plants should be the first choice for many countries. Geothermal heat systems require 25% to 50% less energy for work compared with the traditional systems for heating or cooling. Besides, geothermal equipment is less big: due to the very nature of geothermal energy, geothermal power plants have only a few moving parts, all of which can be easily sheltered inside a relatively small building. What's more, the life span of geothermal equipment is rather long. All these make geothermal power stations easy to build and keep.
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E-Learning: An Alternative Learning Opportunity |
Day school Program Secondary students across Toronto District School Board(TDSB) are invited to take one or two e-Learning courses on their day school timetable. Students will remain on the roll at their day school. The on-line classroom provides an innovative relevant and interactive Learning environment. The courses and on-line classroom are provided by the Ministry of Education These on-line courses are taught by TDSB secondary school teachers are part of the TDSB Student's time table; and appear on the Student's report upon completion Benefits of e-Learning Include: Access to courses that may not be available at his or her TDSB school Using technology to provide students with current information: and. assistance to solve timetable conflicts Is e-Learning for You? Students who are successful in on-line course are usually; able to plan, organize time and complete assignments and activities; capable of working independently in a responsible and honest manner; and , able to regularly use a computer or mobile device with internet access Students need to spend at least as much time with their on-line course work as they would in a face-to-face classroom course. |
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