Reduction of tariff levels has great implications for the domestic firms that rely on such instruments to protect themselves against _____ competition.
Aessential
Bexternal正確答案
Cinterior
Dintramural
答案與詳解
external competition 指「外來(國外)競爭」,關稅正是用來保護國內產業免於進口商品衝擊,語意最貼合。
