问答题

Christopher Columbus was a Spanish sailor, who had spent much of his life as a sailor.

答案: Christopher Columbus was not a Spanish sailor; he was an Ita...
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问答题

正圆柱投影中,投影后的经纬线的夹角只在赤道处为90°。

答案: 错误。在正圆柱投影中,如果投影是等角投影(如墨卡托投影),那么在投影面上,经线和纬线的夹角在所有点上都是90度。然而,如...
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