必修1 Unit 2 English around the world（课件PPT）-【新高考方案】2024高考英语一轮复习（老教材 新高考 人教版）

背写作佳句 ①(2021·浙江6月高考)In the past few years, an increasing number of people and organizations have begun coming up with plans to counter this trend.在过去的几年里，越来越多的人和组织开始提出计划来抵制这种倾向。 ②(2021·全国乙卷)But I recently came across a study that shows why his approach works. 但我最近看到的一项研究表明了为什么他的方法有效。 学案(三)　高考语篇的价值发掘——提升学科素养 2022·新高考Ⅰ卷·阅读理解D篇——对接课标主题：语言学习的规律、方法等 Human speech contains more than 2,000 different sounds, from the common “m” and “a” to the rare clicks of some southern African languages. But why are certain sounds more common than others? A ground-breaking, five-year study shows that diet-related changes in human bite led to new speech sounds that are now found in half the world's languages. More than 30 years ago, the scholar Charles Hockett noted that speech sounds called labiodentals, such as “f” and “v”， were more common in the languages of societies that ate softer foods. Now a team of researchers led by Damián Blasi at the University of Zurich, Switzerland, has found how and why this trend arose. They discovered that the upper and lower front teeth of ancient human adults were aligned (对齐), making it hard to produce labiodentals, which are formed by touching the lower lip to the upper teeth. Later, our jaws changed to an overbite structure (结构), making it easier to produce such sounds. The team showed that this change in bite was connected with the development of agriculture in the Neolithic period. Food became easier to chew at this point. The jawbone didn't have to do as much work and so didn't grow to be so large. Analyses of a language database also confirmed that there was a global change in the sound of world languages after the Neolithic age, with the use of “f” and “v” increasing remarkably during the last few thousand years. These sounds are still not found in the languages of many hunter-gatherer people today. This research overturns the popular view that all human speech sounds were present when human beings evolved around 300,000 years ago.“The set o