单项选择题
A.urea;sulphur;walnut B.sulphur;walnut;urea C.sulphur;urea;walnut D.walnut;urea;sulphur
A.Inspection Fee B.Installation C.Certificate of Quality D.Certificate of Fee
A.Certificate of quality;Certificate of fumigation B.Certificate of quality;Certificate of disinfection C.Certificate of quantity;Certificate of fumigation D.Certificate of quantity;Certificate of disinfection