单选题：一个正方体的高增加10cm，得到新长方体的表面积比原正方体表面积增加120cm，原正方体体积是（　　）．

题目内容：

一个正方体的高增加10cm，得到新长方体的表面积比原正方体表面积增加120cm，原正方体体积是（　　）． A．9cm³
B．12cm³
C．18cm³
D．27cm³

参考答案：

答案解析：

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