46 We packed 9 cartons in one fumigated ______ and the relevant ____________ is attached for reference.
(A) plastic keg ； disinfection certificate
(B) steel plate ； heat-treatment certificate
(C) crate ； fumigation certificate
(D) polystyrene ； original certificate

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統計： A(4), B(1), C(23), D(8), E(0) #2671105