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【单选题】
当湿空气的湿度H一定时，温度t越高则()。A.
相对湿度百分数φ越高，吸水能力越大。
B.
相对湿度百分数φ越高，吸水能力越小。
C.
相对湿度百分数φ越低，吸水能力越小。
D.
相对湿度百分数φ越低，吸水能力越大。
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