16. These goods are ______ and therefore should be kept away from fire.
(A) flammable
(B) poisonous
(C) hygroscopic
(D) hygrometric
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統計: A(554), B(28), C(50), D(49), E(0) #1900566
統計: A(554), B(28), C(50), D(49), E(0) #1900566