400-1816-180
本題由lindy提供
In a stack of boards at a lumber yard, the
(A) 38
(B) 36
(C) 35
(D) 34
(E) 32
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答案：
D
一塊模板從
上往下數(shù)是第20塊，從下往上數(shù)是第16塊
那一共就是20+16=36塊
但是20 和16這兩個數(shù)是重合的 被用了兩次 所以應(yīng)該減去2=34塊 
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