6. Technological and industrial development not only led to economic growth and ________but also posed a threat to
the ecological system.
(A) integrity
(B) serenity
(C) prosperity
(D) deficiency
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統計: A(39), B(14), C(196), D(28), E(0) #717922
統計: A(39), B(14), C(196), D(28), E(0) #717922