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【单选题】
下列关于影响土的渗透系数的因素中描述正确的: 1粒径的大小和级配;2结构与孔隙比;3饱和度;4矿物成分;5渗透水的性质A.
仅 ①② 对渗透系数有影响
B.
④⑤ 对渗透系数无影响
C.
仅 ①②③对渗透系数有影响
D.
①②③④⑤ 对渗透系数均有影响
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A.
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C.
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D.
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too; to
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very, to
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