48. What are Mylar snugs? They are______________________
(A) inert polyester bags.
(B) normal polyethylene bags.
(C) a kind of comic books.
(D) acid-free millboard.
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統計: A(79), B(16), C(11), D(12), E(0) #678688
統計: A(79), B(16), C(11), D(12), E(0) #678688