下面是一篇关于The source of Energy 的gre写作范文。考生应该从范文中领会到整个文章的结构、用词等,这样才有助于gre写作的提高。
GRE 写作范文6:The source of Energy
A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Suns very center. It is here that is to be found the source of the energy that the Sun constantly pours out into space as light and heat. This energy is librated at the center of the Sun as billions upon billions of nuclei of hydrogen atoms collide with each other and fuse together to form nuclei of helium, and in doing so, release some of the energy that is stored in the nuclei of atoms.
The output of light and heat of the Sun requires that some 600 million tons of hydrogen be converted into helium in the Sun every second. This the Sun has been doing for several thousands of millions of year.
The nuclear energy is released at the Suns center as high-energy gamma radiation, a form ofelectromagnetic radiation like light and radio waves, only of very much shorter wavelength. This gamma radiation is absorbed by atoms inside the Sun to be reemitted at slightly longer wavelengths.
This radiation, in its turn is absorbed and reemitted. As the energy filters through the layers of the solar interior, it passes through the X-ray part of the spectrum eventually becoming light. At this stage, it has reached what we call the solar surface, and can escape into space without being absorbed further by solar atoms. A very small fraction of the Suns light and heat is emitted in such directions that after passing unhindered through interplanetary space, it hits the Earth.
gre写作考试范文只是给考生作为一个参考作用,一方面考生可以背诵这些优秀的gre写作范文,另一方面应该从中举一反三,不要只是一味地背诵。
雅思口语话题二月最新汇总
口语评分内幕
雅思口语考试新增艺术类话题
雅思口语得高分须注意细节
最高频的口语小词(二)
雅思口语考试中我说pardon可以吗
雅思口语分类词汇大全2
高分来自少犯错误
雅思口语考试7分经验总结
雅思口语的五个台阶
雅思口语词汇:旅行、就餐词汇
带点口音把话说"酷" 专家为雅思考生出妙计
雅思口语倒数--中国孩子缺少应用型考试能力
雅思听力中的地道口语
最高频的口语小词(一)
外教揭秘雅思口语考官的"偏爱"
雅思口语考试万用模板分享
雅思口语答题参考:Clothes
雅思口语练习必备经典句子
雅思口试开始时所具备的心理素质
从口语考官口中得知的评分标准(下)
雅思口语考试内幕
雅思口语第一部分常考400句(2)
雅思口语常用谚语(四)
雅思必背的32个TOPIC
雅思口语考试解读及复习建议
2005雅思写作备战指南(上)
雅思口语的三个阶段
雅思口语练习中的背景阅读
雅思口语考试场景再现
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |