阿摩線上測驗
79. According to the passage, which of the following is NOT mentioned as a problem caused by ethnic mixing?
(A) civil wars
(B) racial conflicts
(C) human diseases
(D) food shortages
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統計： A(1), B(1), C(1), D(1), E(0) #3362001
統計： A(1), B(1), C(1), D(1), E(0) #3362001
