单项选择题
A.2%~9% B.4%~44% C.5.6%~40% D.15%-84.2%
A.700℃ B.650℃ C.560℃ D.470℃
A.65℃ B.71.3℃ C.80.1℃ D.94℃
A.1.2%~8.0% B.4%~12% C.8%~20% D.8%~37%
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