小明和小芳按如下规则做游戏：桌面上放有5枝铅笔，每次取1枝或2枝，由小明先取，最后取完铅笔的人获胜．如果小明获胜的概率为1，那么小明第一次应该取走几枝铅笔？

The duty-paying value shall be ( ).

A．the value of imports or exports declared by the consignors or consignees

B．the true transaction value of imports & exports

C．the value higher than the transaction value of identical or similar goods

D．the value lower than the transaction value of identical or similar goods