Unit 7 The sea Period One Warmshy;up and Lesson 1 课件（北师大版必修3，课标通用）.pptVIP

文前导读：你可能曾经去过很多名胜古迹，欣赏过那里的风景。 可是你知道有一个特殊的水下奇观在等着你吗？ The Great Barrier Reef (大堡礁) Some people call it an underwater wonderland.Others call it the most magical place on our planet.We are talking about one of the great wonders (奇观) of our natural world—the beautiful and amazing Great Barrier Reef(大堡礁) located off the east coast of Australia. The Great Barrier Reef is not just one reef but actually a series of over 2,000 reefs stretching (延伸)for more than 2,300 kilometers.It is the worlds largest coral (珊瑚) reef.A coral reef is a natural barrier made up of the bodies of living and dead coral.Coral reefs exist in warm climates with clear salt water and lots of sunlight.And since coral reefs are also in shallow water，you can actually see them from above the water! All along the Great Barrier Reef，the color of the coral reef changes as does the color of the water，which varies from a green to a blue color. The best way to experience the magic and beauty of the Great Barrier Reef is to experience it up close and personal，underwater.People who have dived and explored in the Great Barrier Reef claim that it is an underwater wonderland filled with amazing creatures and beautiful sights. This Great Barrier Reef，although beautiful and amazing，is very sensitive to outside forces such as climate change，changes in the patterns of water movement and global warming.Humans are also responsible for damaging the Great Barrier Reef and thus endangering the lives of the animals that live there. If you are one of the lucky people that get the chance to explore this underwater wonderland，be sure to leave everything just the way you find it. 【佳句仿写】 1．The Great Barrier Reef is not just one reef but actually a series of over 2,000 reefs stretching (延伸)for more than 2,300 kilometers. 仿写：我想要的不是牛奶而是咖啡。 _________________________________________________ 2．The best way to experience the magic and beauty of the Great Barrier Reef is to