A.地下水導(dǎo)流層厚度應(yīng)大于20cmB.地下水導(dǎo)流層厚度應(yīng)大于30cmC.地下水導(dǎo)流層厚度應(yīng)大于40cmD.地下水導(dǎo)流層厚度應(yīng)大于30cm;黏土厚度應(yīng)大于100cm,滲透系數(shù)不應(yīng)大于1.0x10-5m/
A.20B.50C.80D.100
A.8B.9C.10D.11