The top two scales are in perfect balance. How many diamonds will be needed to balance the bottom set?

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问题 The top two scales are in perfect balance. How many diamonds will be needed to balance the bottom set?

选项 A、1 diamond.
B、2 diamonds.
C、3 diamonds.
D、4 diamonds.

答案D

解析两个梅花等于三个黑桃加上一个方块，三个梅花等于两个黑桃加上三个方块，那么五个梅花就应该等于5个黑桃加个4个方块。

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