31. The ban will remain effective until it is proved that no traces of the ________ materials are present in the foods.
(A)nutritional
(B)toxic
(C)restrained
(D)exempt

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統計： A(37), B(96), C(13), D(8), E(0) #758658

詳解 (共 1 筆)

#1426586
A 營養的
B 有毒的
C 克制的
D 被豁免的
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