The surface arca of the earth is about( )square kilometers.

题目

The surface arca of the earth is about( )square kilometers.
A.510,000,000 B.51,000,000 C.5,100,000 D.51,000
知识小百科,请选择正确案,并翻译.

答案

A.510,000,000
The surface area of the earth is about 510,000,000 square kilometers.
地球表面积约为510,000,000平方公里