A.提早開花結實,產量提高 B.開花推遲或不開花,產量提高 C.提早開花結實,產量降低 D.開花推遲或不開花,產量降低
A.30 B.60 C.100 D.150
A.1255kJ B.116lkJ C.2870kJ D.1148kJ