选择题

　　1. What is the capital of France?

　　A. London

　　B. Paris

　　C. Berlin

　　D. Rome

　　答案：B

　　解析：The capital of France is Paris.

填空题

　　2. The Great Wall of China is over _______ kilometers long.

　　答案：21,196

　　解析：The total length of the Great Wall of China is approximately 21,196 kilometers.

判断题

　　3. The sun rises in the west and sets in the east. (True/False)

　　答案：False

　　解析：The sun rises in the east and sets in the west.

论述题

　　4. Discuss the impact of climate change on global ecosystems.

　　答案：

　　Climate change has a significant impact on global ecosystems. Rising temperatures, changing rainfall patterns, and increased frequency of extreme weather events have led to shifts in ecosystems around the world. These changes affect biodiversity, species distribution, and ecosystem functioning.

　　For example, melting polar ice caps due to global warming result in habitat loss for polar bears and other ice-dependent species. The acidification of oceans caused by increased carbon dioxide levels threatens coral reefs and marine life. Changes in precipitation patterns can lead to droughts or floods, affecting agricultural productivity and the availability of freshwater resources.

　　In order to mitigate the negative effects of climate change on global ecosystems, it is crucial to reduce greenhouse gas emissions, protect and restore natural habitats, and promote sustainable practices. International cooperation and individual efforts are necessary to safeguard the health and resilience of ecosystems for future generations.

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