Haboob is a type of intense dust storm that occurs primarily in arid regions, especially in parts of Africa and Asia. Characterized by a rapid rise of a large, dark wall of dust, a haboob can suddenly transform the sky from bright blue to an ominous orange hue.

　　These storms are often triggered by strong winds that pick up dust and debris from the dry ground. As the winds gain speed, they carry the dust high into the air, creating a dense, moving wall that can be seen for miles. The visibility during a haboob can be extremely limited, making it dangerous for travelers and outdoor workers.

　　Not only does a haboob pose a physical threat, but it also has significant ecological impacts. The intense winds can erode the soil, leading to further desertification. Additionally, the dust can settle on crops, reducing their growth and yield.

　　Despite its destructive nature, the haboob also plays a role in the natural cycle of the desert. It can help distribute nutrients and seeds across the landscape, promoting biodiversity in unexpected ways.

　　Questions：

　　1、A haboob is most likely to occur in which type of region?

　　A. Mountainous

　　B. Arid

　　C. Coastal

　　D. Forested

　　2、What is the most distinctive feature of a haboob?

　　A. Its slow movement.

　　B. Its high visibility.

　　C. The rapid rise of a dark wall of dust.

　　D. The gentle breeze it brings.

　　3、How do haboobs affect travelers and outdoor workers?

　　A. They provide a scenic view.

　　B. They bring refreshing air.

　　C. They create a safe shelter.

　　D. They pose a safety threat.

　　4、What is one of the ecological impacts of haboobs?

　　A. Promoting crop growth.

　　B. Increasing soil fertility.

　　C. Causing soil erosion.

　　D. Reducing biodiversity.

　　5、Despite its negative impacts, the haboob also ________.

　　A. destroys all crops

　　B. brings heavy rain

　　C. helps distribute nutrients

　　D. reduces biodiversity

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