阅读填空 #43Effects and Purpose of Daylight Saving Time
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Daylight Saving Time (DST) is the practice of moving the clock forward one hour in the spring (+1) and back one hour in the fall (−1). Many have shown that the sudden change in time can affect sleep and increase the risk of traffic . The original idea of DST was to the amount of energy needed during nighttime hours.
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题号#43