The variation between a high air temperature and a low temperature that occurs during the same day is called _______ temperature.

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Accepted Answer

1. The question asks for the name of the temperature difference between the daily high and low.

2. "Diurnal" refers to a 24-hour (daily) cycle. The term "diurnal temperature range" specifically means the difference between the maximum and minimum temperatures that occur within the same day.

3. Other options:
   - "Annual" refers to a yearly variation, not a single day.
   - "Wet bulb" is a measure involving humidity and cooling by evaporation, not the day-to-day high–low difference.
   - "Durian" is a fruit and irrelevant here.

4. Therefore the correct choice is $	ext{diurnal}$ (option a).

FINAL_ANSWER: a

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