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Although the pressure of the cabin is adjusted to prevent altitude sickness, you could still experience sleepiness or a headache.
2019年12月四级真题（第三套）阅读 Section A
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However, bacteria have been shown to live on cabin surfaces, so wash your hands frequently.
2019年12月四级真题（第三套）阅读 Section A
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The lower oxygen pressure found in an aircraft cabin is equivalent to that at 6, 000-8, 000 feet of altitude.
2019年12月四级真题（第三套）阅读 Section A
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The plane stretches a total length of 54 meters, where experienced scuba divers will eventually be able to venture through the cabin and around the plane's exterior.
2019年6月四级真题（第三套）阅读 Section A
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The plane stretches a total length of 54 meters, where experienced scuba divers will eventually be able to venture through the cabin and around the plane's exterior.
2019年6月四级真题（第三套）阅读 Section A