单项选择题
A.65% B.55% C.70%
A.室温 B.(50±2)℃干燥箱中 C.(80±2)℃干燥箱中
A.1d B.3d C.7d
A.0.4mm~0.5mm B.0.5mm~0.6mm C.0.6mm~0.7mm
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