①各民族人民都是国家的主人

②各民族共同繁荣，共同发展

③各族人民平等地享有参与管理国家的权利

④民族区域自治制度是我国的根本政治制度

2008年5月12日，四川省汶川县发生了里氏8.0级大地震．新疆各族群众积极捐款捐物，还紧急烤制了$2\times {10}^4$ 个饱含着新疆人民深情的特色食品——馕，运往灾区．每个馕的厚度约为2cm，若将这批馕摞成一摞，其高度大约相当于（    ）

根据短文内容，选择最佳答案。

Once there was a young boy. He had no family except for an old llama. Each day the boy and his llama walked many miles, looking for a home. Each night they curled up (赌缩）and slept. But on one starry (满天星斗的）evening, the old llama died. The boy buried (埋葬）his friend next to a small icy river. Then he sat under a tree and cried. What would he do? He had no family and no home.

The boy cried for a very long time. But there was no one to comfort (安慰）him. There were only the stars in the sky.

Suddenly, the sky filled with bright light. The boy held his breath. He was afraid to move. One bright star fell to the ground. Slowly, the star took the shape of the old llama. She bent her head and drank from the river. She looked at the boy and smiled. As she jumped back into the sky, bits of llama wool fell. As the sun began to rise, the boy picked up the soft, warm wool. It gave out light in his hands like starlight. He carried the wool to the city and sold it. With the money, he bought a house. He bought two young llamas. He never forgot the star llama. And he was never lonely again.