单项选择题
A.25℃ B.60℃ C.80℃ D.100℃
A.200~300mm B.100~200mm C.100~300mm D.200~400mm
A.0.8 B.1.0 C.1.2 D.1.5
A.0.2% B.1% C.0.5% D.4%
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