单项选择题
A.窜卷 B.铜粉 C.划痕 D.擦伤
A.180℃;5min B.180℃;10min C.178℃;5min D.178℃;10min
A.60℃ B.90℃ C.70℃ D.80℃
A.1.90 B.1.95 C.2.00 D.2.05
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