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雅思写作小作文流程图考官范文:水库发电

2017-07-18 10:40:28来源:网络 柯林斯词典

  新东方在线雅思频道特为大家收集整理了雅思写作小作文流程图考官范文:水库发电。雅思写作考官范文很适合烤鸭研读模仿,在研读及模仿过程中,可以帮助我们检验自己的写作水平,并能很好地吸收和应用优秀范文里的优秀内容~更多雅思报名官网的最新消息,最新、最专业的雅思备考资料,新东方在线雅思网将第一时间为大家发布。

  >>>更多请点击:雅思写作Task 1小作文考官满分范文

  The diagram shows how electricity is generated by a hydroelectric dam.Write a 150-word report for a university lecturer explaining how the process works.

雅思写作小作文流程图考官范文:水库发电

  参考范文

  The diagram illustrates the basic principles of hydroelectric power. The process requires the construction of a large dam connected to a powerhouse. The dam creates a large reservoir and the powerhouse is where the electricity is generated.

  First of all, water trapped in the reservoir behind the dam is forced through an intake. It then flows into a narrow chamber called a penstock, where the resulting high pressure turns a turbine. The turbine is connected to a generator in the powerhouse above, and this is where the movement of the turbine is converted into electricity. The resulting electricity leaves the powerhouse via cables that carry it over long distances to where it can be used.

  It is interesting to note that a hydroelectric dam creates no harmful byproducts and relies entirely on natural forces to produce electricity. After the turbine stage, water flows out through a second channel and into a river. The process is renewable, thanks to the water cycle in nature.


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