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近几年来,列不等式(组)解决实际问题,已成为中考命题新的热点。不等式与有关知识相结合,编拟出有特色、有新意的试题。下面以2400年中考试卷中的一元一次不等式(组)为例,选解此类问题,以开拓同学们的视野。例1(广州市中考题)国际能源机构(IEA)2004年1月公布的《石油市场报告》预测,2004年中国石油年耗油量将在2003年的基础上继续增加,最多可达3亿吨,将成为全球第二大石油消耗大国。已
In recent years, listing inequalities (groups) to solve practical problems has become a new hot spot in the examination proposition. Inequalities and related knowledge are combined to produce distinctive and innovative questions. In the following, the one-time inequality (group) in the 2400 mid-term exam paper is taken as an example to solve these problems in order to open up the students’ vision. Example 1 (Guangzhou Exam Questions) The “oil market report” released by the International Energy Agency (IEA) in January 2004 predicts that China’s annual oil consumption in 2004 will continue to increase on the basis of 2003, reaching up to 300 million yuan. Tons, will become the world’s second largest oil consumer. Already