发布时间 : 星期六 文章2015年职称英语理工类新增文章和翻译 - 图文更新完毕开始阅读
2015年职称英语理工类新增文章
2015年职称英语教材理工类的变动比较小，一共只有5篇新增文章。
2015年职称英语教材理工类新增的5篇文章，分布在阅读理解和补全短文：
阅读理解理工C和理工B各新增一篇文章；
补全短文理工A、B和C各新增一篇文章。 完形填空理工类整体都没有新增文章。
2015年职称英语教材新增文章的对比目录如下：
2015年职称英语教材新增文章的对比目录如下：
理工类 理工C 理工B 理工A
第九篇 An Essential Scientific Process
阅读理解 Famine 旧文章 新增文章 Scientific Process 第五篇：A Record-Breaking Rover 第二十二篇：Real-World Robots 第十三篇：Affectionate Androids 第九篇：Egypt Felled by 第九篇：An Essential 补全短文 第五篇：The Magic of Sound 阅读理解 第二十二篇：Snowflakes 补全短文 第九篇： Heat Is Killer 第九篇：Lightening Strikes 补全短文 第十三篇：Sleeping Giant All life on the earth depends upon green plants. Using sunlight, the plants produce their own food. Then animals feed upon the plants. They
take in the nutrients the plants have made and stored. But that’s not all. Sunlight also helps a plant produce oxygen. Some of the oxygen is used by the plant, but a plant usually produces more oxygen than it uses. The excess oxygen is necessary for animals and other organisms to live.
The process of changing light into food and oxygen is called
photosynthesis. Besides light energy from the sun, plants also use water and carbon dioxide. The water gets to the plant through its roots. The carbon dioxide enters the leaves through tiny openings called stomata. The carbon dioxide travels to chloroplasts, special cells in the bodies of green plants. This is where photosynthesis takes place. Chloroplasts contain the chlorophylls that give plants their green color. The chlorophylls are the molecules that trap light energy. The trapped light energy changes water and carbon dioxide to produce oxygen and a simple sugar called glucose.
Carbon dioxide and oxygen move into and out of the stomata. Water vapor also moves out of the stomata. More than 90 percent of water a plant takes in through its roots escapes through the stomata. During the daytime, the stomata of most plants are open. This allows carbon dioxide to enter the leaves for photosynthesis. As night falls, carbon dioxide is not needed. The stomata of most plants close. Water loss stops.
If photosynthesis ceased, there would be little food or other organic matter on the earth. Most organisms would disappear. The earth’s
atmosphere would no longer contain oxygen. Photosynthesis is essential for life on our planet. 词汇：
nutrient n.营养物
organism n.生物体，有机体
carbon dioxide n.二氧化碳
chloroplast n.叶绿体
molecule n.分子
vapor n.水蒸气
oxygen n.氧气
photosynthesis n.光合作用
chlorophyll n.叶绿素
glucose n.葡萄糖
cease v.停止
注释：
1. Then animals feed upon the plants.动物以植物为食。 练习：
1. In the first paragraph，the word “excess” means
A. heavy.
B. extra.
C. green.
D. liquid.