【題目】下列關于地球的敘述,正確的是( 。
A.人類對地球形狀的認識經(jīng)歷了“渾天說”到“蓋天說”到“地球是球體”的過程
B.地球是一個海洋面積占5.1億平方千米的不規(guī)則球體
C.人類通過地球衛(wèi)星照片認識了地球的真實形狀
D.三分陸地,七分海洋是對地球海陸分布最精確的描述
【答案】C
【解析】由于受觀測條件和科學技術的限制,人類對地球的認識經(jīng)過了漫長的過程,從蓋天說→渾天說→麥哲倫環(huán)球航行→地球的衛(wèi)星照片,最后證實了地球是一個兩極部位稍扁的不規(guī)則球體,故A錯誤?茖W家經(jīng)過長期的精密測量,發(fā)現(xiàn)地球是一個兩極稍扁、赤道略鼓的不規(guī)則球體,面積約5。1億平方千米,故B錯誤。地球是一個巨大的球體。今天,人們通過從宇宙空間發(fā)回的地球衛(wèi)星照片,就能看清地球的真實形狀,故C正確。人們常用“七分海洋,三分陸地”粗略地說明全球海洋和陸地面積的比例,故D錯誤。
故選:C。
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