单项选择题
A.5~10℃B.10~15℃C.15~25℃D.25~35℃
A.5℃B.10℃C.15℃D.20℃
A.2300B.3300C.4300D.15300
A.5%~6%B.6%~7%C.7%~8%D.8%~10%
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