雅思考试题(9)

雅思考试测试题

新东方英澳留学直通车测试题

Such fuels produce far less carbon dioxide than coal or oil, and absorb carbon dioxide as they grow. They are therefore less likely to contribute to the greenhouse effect. But they are rarely competitive with fossil fuels unless subsidised and growing them does no less environmental harm than other crops.

Section E

In poor countries, governments aggravate other sorts of damage. Subsidies for pesticides and artificial fertilisers encourage farmers to use greater quantities than are needed to get the highest economic crop yield. A study by the International Rice Research Institute of pesticide use by farmers in South East Asia found that, with pest-resistant varieties of rice, soil erosion worse.

Section F

Reading Passage 3

The Risks of Cigarette Smoke

Discovered in the early 1800s and named ‘nicotianine’, the oily essence now called nicotine is the main active ingredient of tobacco. Nicotine, however, is only a small

component of cigarette smoke, which contains more than 4,700 chemical compounds, including 43 cancercausing substances. In recent times, scientific research has been providing evidence that years of cigarette smoking vastly increases the risk of

百度搜索“77cn”或“免费范文网”即可找到本站免费阅读全部范文。收藏本站方便下次阅读，免费范文网，提供经典小说综合文库雅思考试题(9)在线全文阅读。