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【題目】春節期間,哈爾濱冰天雪地,而廣州卻花團錦簇,這說明我國冬季氣溫的分布特點是( )

A. 南北溫差不大 B. 南北溫差很大 C. 南北普遍高溫 D. 南北普遍低溫

【答案】B

【解析】

我國地域遼闊,地跨眾多的溫度帶和干濕地區,加上我國地形復雜,地勢高低懸殊,更增加了我國氣候的復雜多樣性.我國冬季南北氣溫差異大,南方溫暖,而越往北氣溫就越低.夏季南北普遍高溫。

我國位于北半球,南北跨將近50個緯度。在冬季,太陽直射在南半球,對北半球來說,緯度越高,正午太陽高度角越低。我國北方地區正午太陽高度角比南方低,白晝短,得到太陽的光熱少。造成春節期間,廣州已是繁花似錦,春意盎然,但小明到達北京后,發現這里仍是千里冰封,萬里雪飄。故選B。

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