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课件网) 仓颉之初作书盖依类象形故谓之文其形声相益即谓之字文者物象之本字者言孳乳而浸多也著于竹帛谓之仓颉之初作书盖依类象形故谓之文其形声相益即谓之字文者物象之本字者言孳乳而 Unit 1 课文语法填空 Reading Welcome to the jungle, a huge sea of green alive with the sounds of animals. This is the Amazon rainforest. As the largest rainforest in the world, it plays a significant role in （maintain ) the fine balance of the Earth's ecosystem. maintaining 3 The Amazon rainforest crosses into eight countries, (include)Brazil and Peru, and one overseas region of France, all on the South American continent. With area of around 6 million square kilometres , the Amazon rainforest is more than half thesize of China. The Amazon River, from the rainforest gets its name, is closeto 6,400 kilometres in （long）- （rough) 100 kilometres longer than the Yangtze River. On its journey from the mountains to the ocean, the river supports many different ecosystems. They give this area the (rich) biod iversity on the Earth: one in ten (know) species in the world can (find)here. including which an length richest roughly known be found 4 Of the 390,000 plant species （know）to us, more than 40,000 can be found in the Amazon. This tall and ancient brazil nut tree produces nuts we can eat; thesewater lilies are big enough to lie down on. The forest's different levels support anunbelievable (vary）of wildlife. At the bottom, there is a system of roots beneaththe ground. Above that is the mass of leaf litter on the dark forest floor. The nextlevel is made up of shorter plants with large leaves. Then there are the (tower) ancient hardwoods, and finally the tops of the tallest trees many metres above theground. Each level of the forest forms its own little world, home different kindsof （live）things. known that variety towering to living 5 More than 1,300 species of birds and over 400 species of mammals hide among the jungle’s plant life. This jaguar is one example. It has a yellowish-brown coat with black spots. a significant number of jaguars survive here, they are only one element of this forest’s food chain. They feed at least 87 species, including frogs. These frogs, in turn, feed on insects eat leaves and fruit. When a jaguar dies, a tiny army of microorganisms helps break its body and return the nutrients to the ear While on which down 6 The Amazon rainforest breathes life the planet by fixing carbon and （produce) over 20 per cent of all the Earth's oxygen. Thus, it is often known as the “lungs ofthe planet". Moreover, the Amazon rainforest is a treasure house of species can be used for food or medicine. Yet there is one major danger to these irreplaceableplants and animals: us. Over the past 50 years, about 17 per cent of the rainforest （appear） due to human activities such as agriculture and cattie farming. Asthe impact of human activities continues （grow）and the list of species in danger of (extinct) becomes lo ... ...
