单项选择题
A.干燥 B.湿 C.明亮 D.阴暗
A.16.5-17.5% B.15.5-16.5% C.14.5-15.5% D.13.5-14.5%
A.1000 B.2000 C.4000 D.5000
A.>=26% B.<＝26% C.>＝36% D.＜＝36%
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