4Ablikim a M,Bai a J Z,Bank Y,et al.Measurements of the cross sections for e+e-→hadrons e+e-→hadrons math Container Loading Mathjax at3.650,3.6648,3.773 Ge V and the branching fraction for<img height="17"border="0"style="vertical-align:bottom"width="13.Physics Letters B.2006,641:145–155.