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【题目】简答题:

(1)用数据说明地球的大小,任意写出一项:地球的平均半径、赤道周长、表面积_________

(2)计算:当北京时间为10月1日16点时,西五区的纽约为_________点。

【答案】平均半径6371千米、赤道周长约4万千米、表面积5.1亿平方千米(任写对一个就可) 3

【解析】

经过测量,地球的极半径为6357千米,赤道半径为6378千米,地球的平均半径为6371千米,地球表面积为5.1亿平方千米,最大周长约4万千米。

(1)描述地球大小的数据是:地球的表面积5.1亿平方千米,平均半径约6371千米,地球赤道周长约4万千米。

(2)因为北京时间是东八区,西五区的时间比我们晚13个小时,就从10月1日16点开始倒退13个小时,西五区的纽约为10月1日3点。

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