• 2022-06-06
    Why is the question of "how easily people can get used to working at night" not a mere academic question
    A: Because few people like to reverse the cycle of sleep aud wakefulness.
    B: Because sleep normally coincides with the hours of darkness.
    C: Because people are required to work at night in some fields of industry.
    D: Because shift work in industry requires people to change their sleeping habits.
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