九年级（全） Units 13～14-【一战成名新中考】2024山东中考英语·教材主题语篇练优质课件PPT（人教版）

九年级（全） Units 13~14 山东英语RJ 英语 1 Ⅰ.阅读理解（2023济南历城六中三模） Cows produce much methane（甲烷）, the world's second worst greenhouse gas, as they break down the grass. They are a large source of the greenhouse gases that are driving climate change. Now scientists have shown the pollution from cows can be reduced by adding a little seaweed（海藻） to their food. Recently, the researchers from the University of California studied 21 cows on a farm for about five months. They taught the cows to get their food from inside a special hood（罩）, which allowed the scientists to 2 know the amount of the methane the cows were giving off. They used a small amount of seaweed, which they mixed with the cows' food. The results were surprisingly good. In some cases, the cows produced 82% less methane. The improvement depended on the kind of food the cows were given. Even the worst-polluting cows produced 33% less methane. Over the five months, the scientists didn't see any signs that the cows' stomachs were getting used to the seaweed and starting to produce more methane again. What's more，the cows that were fed seaweed gained just as much weight as the other cows. But there are still some big problems with the idea of feeding cows seaweed. For one thing, there's not enough seaweed to feed all of the cows in the world. So farmers would have to figure out a way to grow lots of seaweed. A bigger problem is that for most of their lives, cows live in the fields, where they eat grass. That means there's no chance to feed them seaweed every day. Still， it's very good news that something as simple as feeding cows seaweed can help reduce some of the pollution causing the climate crisis（危机）. 1.Why did the researchers carry out the study?___ A. To improve the cows' welfare. B. To test the effects of the seaweed on reducing the pollution by cows. C. To measure the amount of methane produced by cows. D. To discover healthier grass to reduce the pollution from cows. 【解析】 细节理解题。根据第一、二段内容可知，科学家