km2是1000平方米还是1000m的平方啊? 6楼正确， km2是平方公里, km2 = (km)2, 不是 k (m2), 1 km2 =1,000,000 m2 。 见下： square kilometre, symbol km2, is a decimal multiple of the si unit of surface area, the square metre, one of the si derived units. 1 km2 is equal to: * 1,000,000 m2 * 100 ha (hectare) * 0.386102 square miles * 247.105381 acres conversely: * 1 m2 = 0.000 001 (10−6) km2 * 1 hectare = 0.01 (10−2) km2 * 1 square mile = 2.589988km2 * 1 acre = 0.004047km2, 0.4047ha or 4047 m2 note: "km2" means (km)2, square kilometre or kilometre squared, and not k(m2), kilo–square metre. for example, 3 km2 is equal to 3×(1,000m)2 = 3,000,000 m2, not 3,000 m2. 资料来源：wikipedia查看更多
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