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一、单项选择题:(共25小题.每题2分,计50分) 1.北极星所在的星座是:A.天琴座;B.天鹰座;C.大熊座;D.小熊座。 ( ) 2.地球自转产生了:A.四季更替现象;B.昼夜更替现象;C.正午太阳高度的变化;D.昼夜长短的变化。 ( ) 3.关于对流层的叙述.正确的是:A.气温随高度的增加而递增;B.气温随高度的增加而递减;C.空气对流运动不显著;D.空气平流运动显著。 ( )
First, single-choice questions: (a total of 25 small questions. Each question 2 points, 50 points) 1. The constellation where the Polaris is: A. Lyra; B. Aquila; C. Ursa Major; D. Ursa Minor. () 2. The rotation of the earth produces: A. Four seasons replacement phenomenon; B. Day and night replacement phenomenon; C. Changes in the height of the sun at noon; D. Changes in the length of day and night. () 3. The description of the troposphere. The correct ones are: A. The air temperature increases with height; B. The air temperature decreases with height; C. The air convection movement is not significant; D. The air advection movement is significant. ()