阿摩線上測驗
175. What challenge does the industry face?
(A) Lack of consumer interest
(B) Higher production costs
(C) Shortage of raw materials
(D) Difficulty in transportation
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統計： A(14), B(571), C(21), D(15), E(0) #3782107
統計： A(14), B(571), C(21), D(15), E(0) #3782107
