A.20.5,29.5,0B.20.5,29.5,2.25C.20.25,29.75,0D.20.25,29.75,-2.25
A.買入1000股B.賣出1000股C.買入500股D.賣出500股
A.、0.1 B.、0.3 C.、0.5 D.、1