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2025年练习部分高中英语必修第一册上外版
注：目前有些书本章节名称可能整理的还不是很完善，但都是按照顺序排列的，请同学们按照顺序仔细查找。练习册 2025年练习部分高中英语必修第一册上外版 答案主要是用来给同学们做完题方便对答案用的，请勿直接抄袭。
Section B Read and complete the tasks.
Australia's Great Barrier Reef is considered to be the world's largest reef system. It is made up of over 2,900 individual reefs, 900 islands and covers an area of 133,000 square miles. It is also one of the Seven Natural Wonders of the World, a UNESCO World Heritage Site and it is the world's biggest structure made out of living species. The Great Barrier Reef is also unique in that it is the only living organism that can be seen from space.
The geologic formation of the Great Barrier Reef is long and complex. Coral reefs began forming in the region about between 58 and 48 million years ago when the Coral Sea Basin formed. However, once the Australian continent moved to its present location, sea levels began to change and coral reefs started to grow quickly, but changing climate and sea levels after that caused them to grow and decline in cycles. This is because coral reefs need certain sea temperature and sunlight to grow.
Today, scientists believe that complete coral reef structures where today's Great Barrier Reef is were formed 600,000 years ago. The old reef died off, however, due to climate change and changing sea levels. Today's reef began to form about 20,000 years ago when it started to grow on the remains of the older reef. This was due to the fact that the Last Glacial Maximum ended around this time and during glaciation (冰蚀) sea level was much lower than it is today. The current Great Barrier Reef structure is about 6,000 to 8,000 years old.
Due to its numerous kinds of plants and animals, the Great Barrier Reef is a popular tourist destination and around two million people visit it per year. Scuba diving (蛙潜) and tours by small boats and aircraft are the most popular activities on the reef. Since it is a delicate (易损的) habitat, tourism of the Great Barrier Reef is highly managed and sometimes operated as ecotourism. All ships, aircraft and others that want to access the Great Barrier Reef Marine Park need to have a permit.
Despite these protective measures, however, the Great Barrier Reef's health is still threatened due to climate change, pollution, fishing, and invasive species.
Australia's Great Barrier Reef is considered to be the world's largest reef system. It is made up of over 2,900 individual reefs, 900 islands and covers an area of 133,000 square miles. It is also one of the Seven Natural Wonders of the World, a UNESCO World Heritage Site and it is the world's biggest structure made out of living species. The Great Barrier Reef is also unique in that it is the only living organism that can be seen from space.
The geologic formation of the Great Barrier Reef is long and complex. Coral reefs began forming in the region about between 58 and 48 million years ago when the Coral Sea Basin formed. However, once the Australian continent moved to its present location, sea levels began to change and coral reefs started to grow quickly, but changing climate and sea levels after that caused them to grow and decline in cycles. This is because coral reefs need certain sea temperature and sunlight to grow.
Today, scientists believe that complete coral reef structures where today's Great Barrier Reef is were formed 600,000 years ago. The old reef died off, however, due to climate change and changing sea levels. Today's reef began to form about 20,000 years ago when it started to grow on the remains of the older reef. This was due to the fact that the Last Glacial Maximum ended around this time and during glaciation (冰蚀) sea level was much lower than it is today. The current Great Barrier Reef structure is about 6,000 to 8,000 years old.
Due to its numerous kinds of plants and animals, the Great Barrier Reef is a popular tourist destination and around two million people visit it per year. Scuba diving (蛙潜) and tours by small boats and aircraft are the most popular activities on the reef. Since it is a delicate (易损的) habitat, tourism of the Great Barrier Reef is highly managed and sometimes operated as ecotourism. All ships, aircraft and others that want to access the Great Barrier Reef Marine Park need to have a permit.
Despite these protective measures, however, the Great Barrier Reef's health is still threatened due to climate change, pollution, fishing, and invasive species.
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