c2dddd4433047faff8204d650ce0eb08483adc6acd14233c34eda2350be4722a
c2dddd4433047faff8204d650ce0eb08483adc6acd14233c34eda2350be4722a如何用6根火柴拼成4个同样大小的三角形？（注：不得破坏火柴。）（答案见下期（试读）...
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