7. A series of reports on beef and pork containing traces of ractopamine, a leanness-enhancing feed additive, led to a significant decline in meat sales _____.
(A) precipitously
(B) intrinsically
(C) fluctuatingly
(D) ostensibly
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統計: A(42), B(18), C(30), D(9), E(0) #3425852
統計: A(42), B(18), C(30), D(9), E(0) #3425852