项目活动·实践
任务情境:假设学校即将举办一场"自然奇观探索之旅"展览活动,邀请同学们担任"小小自然探索家",为观众介绍自己最喜爱的自然奇观。同学们需要设计一张海报来展示自然奇观的美丽与独特之处,并用英文向观众介绍这个自然奇观的特征以及人类探索它的意义。请运用本单元所学相关知识,参考下面思维导图,完成宣讲稿。

One possible version:
The Grand Canyon
Good morning, everyone! Today, I want
to introduce one of the most amazing natural
wonders in the world—the Grand Canyon.
The Grand Canyon is located in
Arizona, USA. It is a place that attracts
millions of visitors every year. When you
stand at the edge of the Grand Canyon, you
will be amazed by its beauty. It is so deep
and wide that you can't see the bottom.
The Grand Canyon is about 277 miles
long, up to 18 miles wide, and over a mile
deep. It is much deeper than any other
canyon I have ever seen. The walls of the
canyon are made of different layers of rock.
Each layer has its own colour and story. The
colours of the rocks change with the
sunlight. In the morning, they look orange
and red. In the evening, they turn purple
and blue. It is like a beautiful painting.
Exploring the Grand Canyon is very
important to us. It helps us learn about the
history of the earth. We can see how the
earth has changed over time. It also reminds
us to protect nature. The Grand Canyon is
more beautiful than any other place I have
ever been to. We should do everything we
can to keep it clean and safe.
Thank you for listening to my introduction.
I hope you can visit the Grand Canyon one
day and see its beauty with your own eyes.

【分析】本次任务是撰写关于自然奇观的英文宣讲稿，需依据给定思维导图的五个核心模块（问候、自然奇观简介、事实特征、探索的重要性、结论）完成。解题时，先选取典型自然奇观（如大峡谷），对应每个模块填充内容：问候用礼貌开场语；简介说明奇观的位置与吸引力；事实部分补充具体数据和外观特点；重要性部分阐述探索对了解地球历史、保护自然的意义；结论部分致谢并发出参观邀请，确保内容符合思维导图要求，语言通顺自然。
【解析】按照思维导图的结构分步撰写：
1. 问候：Good morning, everyone! Today, I want to introduce one of the most amazing natural wonders in the world—the Grand Canyon.
2. 自然奇观简介：The Grand Canyon is located in Arizona, USA. It is a place that attracts millions of visitors every year. When you stand at the edge of the Grand Canyon, you will be amazed by its beauty. It is so deep and wide that you can't see the bottom.
3. 事实特征：The Grand Canyon is about 277 miles long, up to 18 miles wide, and over a mile deep. It is much deeper than any other canyon I have ever seen. The walls of the canyon are made of different layers of rock. Each layer has its own colour and story. The colours of the rocks change with the sunlight. In the morning, they look orange and red. In the evening, they turn purple and blue. It is like a beautiful painting.
4. 探索的重要性：Exploring the Grand Canyon is very important to us. It helps us learn about the history of the earth. We can see how the earth has changed over time. It also reminds us to protect nature. The Grand Canyon is more beautiful than any other place I have ever been to. We should do everything we can to keep it clean and safe.
5. 结论：Thank you for listening to my introduction. I hope you can visit the Grand Canyon one day and see its beauty with your own eyes.
【答案】One possible version:
The Grand Canyon
Good morning, everyone! Today, I want to introduce one of the most amazing natural wonders in the world—the Grand Canyon.
The Grand Canyon is located in Arizona, USA. It is a place that attracts millions of visitors every year. When you stand at the edge of the Grand Canyon, you will be amazed by its beauty. It is so deep and wide that you can't see the bottom.
The Grand Canyon is about 277 miles long, up to 18 miles wide, and over a mile deep. It is much deeper than any other canyon I have ever seen. The walls of the canyon are made of different layers of rock. Each layer has its own colour and story. The colours of the rocks change with the sunlight. In the morning, they look orange and red. In the evening, they turn purple and blue. It is like a beautiful painting.
Exploring the Grand Canyon is very important to us. It helps us learn about the history of the earth. We can see how the earth has changed over time. It also reminds us to protect nature. The Grand Canyon is more beautiful than any other place I have ever been to. We should do everything we can to keep it clean and safe.
Thank you for listening to my introduction. I hope you can visit the Grand Canyon one day and see its beauty with your own eyes.
【知识点】英文应用文写作、自然奇观英文表达
【点评】该宣讲稿严格遵循给定思维导图的结构，内容详实，数据准确，既清晰介绍了大峡谷的特征，又点明了探索自然奇观的意义，语言流畅自然，符合英文演讲的要求，是一篇优秀的范例。
【难度系数】0.5