BBI短:(MA(VV,3)+MA(VV,5)+MA(VV,8)+MA(VV,10))/4; BBI中:(MA(VV,10)+MA(VV,14)+MA(VV,21)+MA(VV,35))/4; BBI长:(MA(VV,35)+MA(VV,49)+MA(VV,63)+MA(VV,125))/4; BBI长长:(MA(VV,125)+MA(VV,250)+MA(VV,150)+MA(VV,200))/4;