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有这样一个题目: 若长方体的对角线之长为8,其长、宽、高之和为14,则全面积为__。 解此题倒不难,许多复习资料上是这样解的:
There is such a problem: If the length of the rectangular parallelepiped is 8 and the sum of its length, width and height is 14, then the whole area is __. It is not difficult to solve this problem. Many review materials are solved like this: