41 As early as 1735, Englishman Obadiah Wild secured a flame retardant technology patent for
combustible substances from flaming.
(A)preserving
(B)predicting
(C)pretending
(D)preventing
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統計: A(1), B(0), C(0), D(0), E(0) #3478849
統計: A(1), B(0), C(0), D(0), E(0) #3478849