阿摩線上測驗
20 Each ______of the Customs Import Tariff is identified by a four-digit code.
(A)section
(B) chapter
(C)heading
(D)subheading
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統計： A(25), B(26), C(134), D(10), E(0) #2013446
統計： A(25), B(26), C(134), D(10), E(0) #2013446
