2015职称英语教材新增文章汇总 理工类新增文章汇总

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详情的对比目录如下：

理工C阅读理解新增文章

第九篇 An Essential Scientific Process

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

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