【題目】嚴(yán)格地說,地球的形狀是一個(gè)(

A.正球體 B.球體

C.圓 D.兩極稍扁、赤道略鼓的橢球體

【答案】D

【解析】

試題分析:根據(jù)科學(xué)家們的測(cè)量,地球的極半徑是6357千米,赤道半徑是6378千米。所以地球是一個(gè)赤道略鼓,兩極略扁的不規(guī)則球體。

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