单项选择题
A.20℃ B.22℃ C.24℃ D.26℃
A.5 B.10 C.15 D.20
A.0.1 B.0.2 C.0.3 D.0.4
A.1/2~1/3 B.1/3~1/4 C.1/4~1/5 D.1/5~1/6
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