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    【题目】春节期间，哈尔滨冰天雪地，而广州却花团锦簇，这说明我国冬季气温的分布特点是（　）

    A. 南北温差不大 B. 南北温差很大 C. 南北普遍高温 D. 南北普遍低温

    【答案】B

    【解析】

    我国地域辽阔，地跨众多的温度带和干湿地区，加上我国地形复杂，地势高低悬殊，更增加了我国气候的复杂多样性．我国冬季南北气温差异大，南方温暖，而越往北气温就越低．夏季南北普遍高温。

    我国位于北半球，南北跨将近50个纬度。在冬季，太阳直射在南半球，对北半球来说，纬度越高，正午太阳高度角越低。我国北方地区正午太阳高度角比南方低，白昼短，得到太阳的光热少。造成春节期间，广州已是繁花似锦，春意盎然，但小明到达北京后，发现这里仍是千里冰封，万里雪飘。故选B。

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