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【单选题】
地球半径6400km，鸡蛋平均半径0.05m，蛋壳厚度约0.0005m，地球半径是鸡蛋半径的6400÷0.05＝128×10的6次方倍。若将鸡蛋变大到地球，可得蛋壳厚度为0.0005×128×106＝64 km。该数值（）地壳的平均厚度。
A.
远大于
B.
远小于
C.
约等于
D.
不可比
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