some people live in high mountains.the air up high is thin.{这是一篇阅读里的第一句话,

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some people live in high mountains.the air up high is thin.{这是一篇阅读里的第一句话,
some people live in high mountains.the air up high is thin.{这是一篇阅读里的第一句话,

some people live in high mountains.the air up high is thin.{这是一篇阅读里的第一句话,
1.C 2.lungs 3.the people living in low places 4.A 5.C 6.A 绝对正确.