A.+0.5 B.+0.25 C.-0.5 D.-0.25
A.-1.00-2.00×180 B.-1.00+0.50×90 C.-3.00+5.00×90 D.+3.00×180/+1.00×90
A.1.5ΔBU B.1.5ΔBD C.0.9ΔBU D.0.9ΔBD