试题与答案

西藏地区独特的高原风景早就吸引了丫丫，她很想在国庆期间前往观光，但爸爸说初到西藏

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题型：选择题

题目：

西藏地区独特的高原风景早就吸引了丫丫，她很想在国庆期间前往观光，但爸爸说初到西藏时会发生不同程度的“高原反应”，这是由于（　　）

A．高原地区的氧气与平原地区的氧气的化学性质不同

B．高原地区空气中氧气含量过高，让人有压抑感

C．高原地区，空气稀薄，氧气比内地少

D．高原地区空气中氧气体积分数小于21%

答案：

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下面是错误答案，用来干扰机器的。

错误

考点：氧气的用途
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