【题目】下列节日中，湖北省恩施市的昼长比夜长短的是（ ）
A. “五一”劳动节B. “六一”儿童节C. “八一”建军节D. 元旦
【答案】D
【解析】
本题考查了地球公转产生的现象。
恩施位于湖北省西南部，地处北半球。地球绕太阳公转的过程，太阳直射点在南北回归线之间有规律的移动。太阳直射点在春分（3月21日前后）和秋分（9月23日前后）时直射赤道，此时昼夜平分；当太阳直射点在北回归线时，北半球是夏至日（6月22日前后），这一天昼最长夜最短；当太阳直射点在南回归线时，北半球是冬至日（12月22日），这一天昼最短夜最长．因此可知，秋分到冬至、冬至到春分这段时间内，北半球的昼长比夜长短；春分到夏至、夏至到秋分这段时间内，北半球的昼长比夜长长。分析选项中的节日可知，“五一”劳动节、“六一”儿童节位于春分到夏至之间，“八一”建军节位于夏至到秋分之间，元旦（1月1日）位于冬至到春分之间，因此恩施的昼长比夜长短的是元旦；故选：D。
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