39. 正常複合材料預浸布疊層為：(1). applying external heat. (2) room temperature exposure. (3). adding a catalyst or curing agent to the resin. (4). applying pressure.


(A) 2 and 3.
(B) 1 and 4.
(C) 1, 3, and 4.
(D) 2 and 3

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