1、Unit2 Working the landGrammar and composition p20Emphasis 强调 A Exploring the rules Below is an online article about agriculture along the Yellow River. Find the sentences that use emphasis and fill in the table below. The first one has been done for you. 下面是一篇关于黄河沿岸农业的在线文章，探索这些规则。找出使用强调的句子，填写下表。第一个已
2、经为你做好了。The Yellow River, Chinas second longest river, got its name from the yellow soil carried along in its water. It flows for about 5,464 kilometres, from the remote snow-capped mountains on the Qinghai-Tibet Plateau to the vast Bohai Sea. It is because of the rivers important role in developing
3、agriculture and establishing civilization that it is symbolically referred to as the Mother River of China.Archaeological evidence shows that farming societies first appeared on the banks of the Yellow River as far back as 7,000 years ago. It is really easy to see why these societies considered it a
4、n ideal place for farming. The land was flat and its soil was refreshed by silt after every flood. The river not only provided nutrient-rich soil, but also water for irrigation. Therefore, it came as no surprise that a wide variety of crops were grown along the river, typically wheat and soya beans,
5、 which were well-suited to the dry climate of this area.Today, the river does maintain a significant position as agriculture along its banks continues to expand and thrive. Thanks to new agricultural methods, rain-fed crops such as rice have become more common in the region. Additionally, eco-agricu
6、ltural practices work side by side with traditional ones to promote sustainable development of farming.Without doubt, the Yellow River will continue to bring such agricultural abundance to China that life without its priceless gifts would be unimaginable.黄河，中国第二长河，因其河水携带的黄壤而得名。它绵延约5464公里，从青藏高原的雪山，一直
7、延伸到辽阔的渤海。正是由于黄河在发展农业和建立文明方面的重要作用，它才被象征性地称为中国的母亲河。很容易理解为什么这些社会，认为它是一个理想的地方农业。每次洪水过后，土地平坦，泥沙充实。这条河不仅提供了养分丰富的土壤，还提供了灌溉用水。因此，沿河种植各种各样的农作物也就不足为奇了，特别是小麦和大豆，它们非常适合这个地区的干燥气候。由于新的农业方法，雨水灌溉的作物，如水稻，在这个地区变得越来越普遍。此外，生态农业实践与传统农业实践并肩工作，以促进农业的可持续发展。毫无疑问，黄河将继续给中国带来如此丰富的农业资源，没有它的无价之宝的生活将是不可想象的。Integrated skills p22Co
8、mparing chemical farming and organic farming A Sarah is doing research on farming in order to write an article for the Farm to School Week. She finds a website article about chemical farming. Read the article and answer the following questions. Sarah 正在做农业研究，为了给农场到学校周写一篇文章。她在网上找到一篇关于化学农业的文章。阅读文章并回答以
9、下问题。Chemical farmingThe use of chemicals in farming is widespread with more than 90 per cent of the worlds farmers using artificial fertilizers and pesticides. Such chemicals are highly effective, but unfortunately they can have damaging impacts. Understanding more about the advantages and disadvant
10、ages of using chemicals in farming will help you decide which side of the fence you stand on, and ultimately, what food you will eat!The fact is that chemicals work faster than organic products. Since they release nutrients quickly, chemical fertilizers enrich poor soil rapidly. This allows plants t
11、o grow faster than they would with organic fertilizers, such as animal waste. Similarly, the quick actions of artificial pesticides make it easy to protect crops from infections or pests. It follows that the use of chemicals brings immediate results, in terms of both plant growth and protection.Neve
12、rtheless, the downsides of using chemicals in farming are obvious. These chemicals enter our water and soil very easily, and tend to remain in the environment for decades, slowly breaking down, or not at all. Apart from polluting the environment, they also affect all living organisms, either immedia
13、tely or over long periods of time. For example, the worlds bee population has declined alarmingly over the last few years, mainly due to the overuse of pesticides. Similarly, studies have found that a range of diseases, such as cancers in humans, are linked to chemicals used in farming. A growing aw
14、areness of the dangers of such chemicals led biologist Rachel Carson to publish her book Silent Spring in 1962, which revealed how the pesticide DDT was causing severe damage to the environment and to us. Carson argued that once pesticides entered the environment, they not only killed insects but al
15、so made their way up the food chain to threaten birds and fish and, eventually, human populations.It is commonly acknowledged that chemicals are an important tool for farmers; however, it is important to weigh the pros and cons of chemicals before using them, and if possible, to minimize the damage
16、they do.化学农业化学品在农业中的使用非常普遍，世界上90% 以上的农民使用人工化肥和杀虫剂。这些化学物质非常有效，但不幸的是，它们会造成破坏性的影响。更多地了解在农业中使用化学品的优缺点将有助于你决定你站在哪一边，以及最终，你将吃什么食物! 事实上，化学品比有机产品起作用更快。因为它们释放养分很快，化学肥料很快就能肥沃贫瘠的土壤。这使得植物比使用有机肥料生长得更快，比如动物粪便。同样，人工杀虫剂的快速作用使得保护农作物免受感染或虫害变得容易。因此，在植物生长和保护方面，使用化学品会带来立竿见影的效果。然而，在农业中使用化学品的负面影响是显而易见的。这些化学物质很容易进入我们的水和土壤，往往会在环境中停留数十年，慢慢分解，或者根本不分解。除了污染环境，它们还会影响所有的生物体，不管是短期的还是长期的。例如，在过去的几年里，世界上的蜜蜂数量急剧下降，主要是由于过度使用杀虫剂。同样，研究发现一系列疾病，如人类的癌症，与农业中使用的化学物质有关。生物学家雷切尔 卡森在1962年出版了寂静的春天一书，书中揭示了杀虫剂 ddt 是如何对环境和人类造成严重破坏的。卡森认为，一旦杀虫剂进入环境，它们不仅会杀死昆虫，还会沿着食物链上升，威胁鸟类和鱼类，最终威胁人类。 人们普遍认为化学品是农民的重要工具;然而，在使用化学品之前权衡利弊是很重要的，如果可能的话，将它们的危害降到最低。
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