Unit 5 单元拔尖检测 (限时：100 分钟 满分：90 分) 第一部分 阅读理解(共两节，满分35 分) 第一节(共15 小题；每小题2 分，满分30 分) 阅读下列短文，从短文后每题所给的A、B、C 和D 四个选项中，选出最佳选项。 A The Yangtze River dolphin is the only kind of dolphin that lives in freshwater all its life. Scientists say that the finless freshwater dolphin that has lived in the Yangtze River for over 20 million years will die out in 15 years. It’s in danger of disappearing forever. Dangers: Dredging (挖掘) of their habitat. Heavy boat traffic in the Yangtze River. Insecticide (杀虫剂) and mercury (汞). ( ) 1. How long has the Yangtze River dolphin lived in the Yangtze River A. For 20 million years. B. For less than 20 million years. C. For more than 20 million years. D. We don’t know. ( ) 2. What is NOT a danger to the Yangtze River dolphin A. Dredging of the river bed. B. Insecticide and mercury. C. Swimmers. D. Heavy boat traffic in the river. ( ) 3. What does the Yangtze River dolphin mainly eat A. Fish and shrimps. B. Frogs. C. Turtles. D. Sharks. B China is a country in East Asia. More than 1.4 billion people live here. That’s about a fifth of all the people on Earth! And China is the third largest country by the total area in the world. It covers about 9.6 million square kilometers. This large country has many different kinds of land. It has some very low areas of land. In fact, the second lowest point on Earth is in China. It’s Aydingkol Lake in the Turpan Depression (吐鲁番盆地). Other parts of China have mountains. For example, part of the Himalayan Mountains is in the western part of the country. This area has some of the highest mountains in the world. The snow in the mountains is a source (源头) of many rivers. In fact, the snow makes two of China’s most important rivers. They are the Yangtze River and the Yellow River. The Yangtze River is the longest river in Asia and the third longest river in the world! The Yellow River is China’s second longest river. It is very special to Chinese people, as it is the birthplace of Chinese civilization (文明). There are thousands of rivers in China. But there is still desert in the country. And rainforests are also in some areas of the country. So visitors can enjoy diverse landscapes (景色) in this country! ( ) 4. What cannot we learn from the first paragraph A. How many people there are in China. B. How large China is in size. C. Which is the largest country in the world. D. Where China is in Asia. ( ) 5. What does the third paragraph mainly tell us A. How to stop people polluting the rivers. B. Something about China’s most important rivers. C. Something about the rivers in the mountains. D. Why the two rivers are important to Chinese people. ( ) 6. What does the underlined word “diverse” mean A. 单一的 B. 古老的 C. 多样的 D. 崎岖的 ( ) 7. Which of the following is not true according to the passage A. Aydingkol Lake is the second lowest point on Earth. B. About one fifth of the people in the world li ... ...
~~ 您好，已阅读到文档的结尾了 ~~
